347 FXUS66 KSEW 220915 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 215 AM PDT Wed Apr 22 2026 .SYNOPSIS... Showers will continue this morning, as well as breezy winds today as an upper level moves through to the south. Drier and warmer conditions will begin Thursday and continue through this weekend with a stronger ridge of high pressure building offshore. && .SHORT TERM /TODAY THROUGH FRIDAY/... Mostly cloudy skies with a few scattered showers prevail across western Washington early this morning. These showers are being driven by a broad and vertically-stacked low pressure system centered over southwest Oregon and moving inland. Increasing moisture from the southeast will move up and into western Washington later this morning for increased chances of some light rain, particularly across southwestern Washington and the Cascades. Additionally, with westerly surface flow, that will help to maintain convergence across the Puget Sound, with increased chances for continued cloudiness and showers there through much of the day. Winds will likely remain elevated throughout the day with a few gusts up to 20 to 30 mph as the system moves through. With snow levels above 5000 to 6000 ft, the vast majority of precipitation will fall as rain over the mountains. Winds and rain begin to taper off overnight into early Thursday as the system departs to the east and upper level ridging develops over the northeast Pacific, putting western Washington under drier, northwesterly flow aloft. As a shortwave rides along the upper low over eastern Washington, there will still be some slight chances for showers for portions of the Cascades. However, the remainder of the area should remain mostly dry. Snow levels will lower to around 3000 to 4000 ft, so there may be some light mixed precip or flurries, but no significant accumulations are expected. Onshore flow will continue to prevail at the surface on Thursday with continued convergence over the Puget Sound, mostly in the way of increased clouds whereas most other places will see more sunshine Thursday. Higher confidence in more area-wide sunshine Friday as surface gradients turn offshore and a thermal trough begins to build along the coast. Winds will increase on Friday as north-south gradients temporarily increase with low pressure nudging northward from Oregon. Clearer skies and lighter winds will allow for warming daytime highs--into the mid to upper 60s by Friday--and relatively cool overnight lows--in the upper 30s to to low 40s. With the system not far away, chances will linger for some light precipitation over the Cascades. High temperatures will return to near 60 Thursday, further increasing to the mid 60s on Friday. && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... Models show a fairly steady weather pattern continuing into the weekend and early next week with mostly dry conditions, highs in the low to mid 60s, and lows in the 40s. Winds remain mostly light through offshore flow will continue into the weekend, keeping relative humidity dry. Deterministic models are hinting at several weak shortwaves move across the area starting early next week, but the vast majority of ensemble members are keeping the area dry, with only slight chances for showers across portions of southwest Washington and the Cascades at this time. && .AVIATION... South to southeasterly flow aloft will turn east to north- northeasterly on Wednesday as a broad upper trough moves onshore over northern California and southwest Oregon. Low-level flow is onshore this morning. Southwesterly winds will increase this afternoon with gusts 20 to 25 kt possible, with the best chances over southwestern WA. Rain showers are forecast to increase in coverage this morning as well - along with MVFR ceilings. A weak PSCZ has lowered ceilings (IFR to LIFR) for KSEA, KBFI and KPWT as the NBM notes a 15-20% chance of IFR ceilings remaining through 15-16z. Any lingering IFR cigs should lift to MVFR by the afternoon as showers diminish. A mix of VFR/MVFR expected Wednesday night. KSEA...A weak PSCZ has brought LIFR/IFR cigs to the terminal early this morning. A return to MVFR is likely as the morning progress but a slight chance (15-20%) of IFR through 16z exists. Ceilings will be slow to improve - if at all throughout the day with a window of VFR possible after 00z. However, low cigs are likely to return overnight Wednesday. SW wind gusts up to 20 kt throughout the daytime hours. 41/62 && .MARINE... Broad high pressure is remaining well offshore for an onshore flow pattern. The flow will turn more northerly over area waters Friday into Saturday with a broad surface ridge over the western Canadian provinces and lower pressure over the Pacific Northwest. Small Craft Advisories remain in effect for the Central/East Strait of Juan de Fuca, coastal waters and Puget Sound for today. Seas will build and steepen over the coastal waters today up to 11 to 15 ft, as well as nearing rough bar criteria at Grays Harbor by tonight. Seas will then gradually subside later Thursday into the weekend. 41 && .HYDROLOGY... No river flooding is expected in the next seven days. && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...Small Craft Advisory until 8 AM PDT Wednesday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca. Small Craft Advisory from 4 AM to 8 PM PDT Wednesday for Puget Sound and Hood Canal. Small Craft Advisory from 11 AM Wednesday to 11 AM PDT Thursday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-Coastal Waters From Cape Flattery To James Island Out 10 Nm-Coastal Waters From James Island To Point Grenville 10 To 60 Nm-Coastal Waters From James Island To Point Grenville Out 10 Nm-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm. && $$

319 FXUS66 KPQR 220940 AFDPQR Area Forecast Discussion National Weather Service Portland OR 240 AM PDT Wed Apr 22 2026 .SYNOPSIS...Conditions remain cool and wet today as an upper level low and surface fronts move over the region. A warming and drying trend is expected Thursday and through the start of next week as high pressure builds over the eastern Pacific. && .DISCUSSION...Now through Tuesday Night...Shower activity has dropped off over much of the area as the upper level low shifts eastward. Radar imagery as of 2 am does show scattered showers persisting over the Cascades and Cascade Foothills along westerly surface flow. Precipitation is expected to increase as a weak cold front drops in from the northwest, bringing another round of light rain through the day. Rain is expected to enter the northern portion of the forecast area around 5 am and spread southward through the morning. Conditions trend drier from north to south through the afternoon and evening, though showers linger over the Cascades and Cascade Foothills into the overnight hours. Rainfall totals are expected to be light west of the Cascades ranging from a few hundredths in the for rain shadowed portions of the Willamette Valley to around 0.35 inches over parts of the Coast Range. Higher totals between 0.25-0.50+ inches over the Cascades are expected with terrain enhancement supporting more forcing. There is a low (10-15%) chance for thunderstorms over the Lane and Linn count Cascade Foothills this afternoon. Showers may linger over the Cascades Thursday morning but conditions are expected to trend warmer and drier through the day and into the weekend. Highs bounce back into the low 60s inland and mid to upper 50s along the coast. Upper level ridging over the eastern Pacific tries to build into the PacNW heading into the weekend but a large upper level low over central Canada and the northern Plains will hinder its eastward momentum. There is some uncertainty in what the upper level pattern looks like over the region by Saturday, split between the pinch point of the upper level features or possibly shortwave energy coming more overhead. Either way, conditions are expected to remain dry with relatively minor differences in high temperatures Friday through Monday. Highs in the mid 60s to low 70s inland and upper 50s to low 60s each day can be expected. The Cascades could see light scattered rain showers each day, mainly during the afternoon and evening hours. -19 && .AVIATION...Currently MVFR along the coast and VFR inland with cloud cover hovering around 3-5 kft with light west to northwest winds around 5 kt. Scattered showers continue over the Cascade. Expecting conditions to trend toward MVFR inland and possibly IFR along the coast as a week cold front drops through the area starting early this morning. Precipitation will be light but lower clouds should lower to 1500-2500 ft as the front passes through. Winds are also expected to increase from the southwest after 12z. Gusts for all terminals could reach 20 kt between 15z Wed and 03z Thu, slightly earlier along the coast with gusts up to 25 kt possible. KTTD and the western Columbia River Gorge will also see higher winds up to 30-35 kt due to the enhanced pressure gradient in the area. Winds all appear to be unidirectional and therefore LLWS is not a threat at this time. KPDX AND APPROACHES...VFR conditions with light northwesterly winds around 5 kt. Another cold front is expected to move through the area beginning around 12-15z, bringing MVFR CIGs and gusty southwest winds. CIGs are expected to drop to between 1500-2500 feet. Wind gusts of 20-25 kt possible after 16-18z today with higher gusts to around 30 kt at KTTD. -19 && .MARINE...A cold front approaching from the northwest will bring increasing seas and westerly to northwesterly winds. By early to mid morning, a northwest swell will push seas up to 7 to 8 ft with westerly winds around 15 to 20 kt with gusts up to 25 kt over the central and northern waters. The southern waters will see winds and seas increase a bit later in time, beginning this afternoon. Seas peak between 9-13 ft Wednesday evening into tonight at 10 to 12 seconds, bringing steep and hazardous seas. The highest seas are expected over the northern outer waters beyond 20-30 nm. Winds decrease tonight behind the frontal passage, however seas will remain elevated until significant wave heights fall below 10 ft by late Thursday afternoon. A Hazardous Seas Warning will be in effect for PZZ271 from 2 PM PDT today through 5 AM PDT Thursday, following a Small Craft Advisory that begins at 5 AM PDT today. The remaining marine zones have Small Craft Advisories in effect from 5 AM today until 5 PM PDT Thursday, except 5 PM today until 5 PM PDT Thursday for the southern waters as winds and seas take longer to increase south of Cape Foulweather. Note there is a 10-25% chance seas will peak near 14-15 ft over the northern outer waters, which represents a reasonable worst case scenario. A strong ebb current will occur in the Columbia River Bar this morning, peaking around 9 AM and pushing seas up to 7 to 8 ft with steep ebb chop over the main channel. Seas then increase to around 9 to 10 ft over the main channel late today and remain elevated tonight into Thursday. In addition, westerly winds will increase to 15 to 25 kt with gusts up to 25 kt. Winds will become southwest around 10 kt with gusts up to 15 kt Thursday morning. A Small Craft Advisory has been issued from 5 AM PDT today to 5 PM PDT Thursday for the Columbia River Bar to cover these hazards. A second strong ebb current is expected Thursday morning, peaking around 10 AM. -19/23 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. PZ...Small Craft Advisory from 5 AM early this morning to 5 PM PDT Thursday for PZZ210-251-252-272. Small Craft Advisory from 5 PM this afternoon to 5 PM PDT Thursday for PZZ253-273. Small Craft Advisory from 5 AM early this morning to 2 PM PDT this afternoon for PZZ271. Hazardous Seas Warning from 2 PM this afternoon to 5 AM PDT Thursday for PZZ271. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland

425 FXUS66 KMFR 220932 AFDMFR Area Forecast Discussion National Weather Service Medford OR 232 AM PDT Wed Apr 22 2026 .DISCUSSION... Key Points: * Showers continue today. Gusty winds expected from the Cascades eastward. * Showers taper off tonight and Thursday morning. Daytime temperatures trend warmer Thursday into Friday. * Increasing chances for showers Saturday and Sunday. An upper low is moving inland today and will gradually shift east of the area tonight. This will bring continued showers to the area through today, tapering off tonight into Thursday morning. Additionally, gusty west winds are expected for areas from the Cascades east (gusts 25-40 mph). Thunderstorm chances are lower today than yesterday but there remains a low 5-10% chance for thunderstorms this afternoon. As the low moves eastward, ensembles show showers tapering off tonight with some lingering light showers near the coast Thursday morning. Cool morning temperatures are expected Thursday and Friday mornings, with localized frost possible in some valleys west of the Cascades (mainly the Illinois Valley) and temperatures in the 20s and lower 30s east of the Cascades. Daytime temperatures will trend warmer Thursday into Friday. By Friday, the National Blend of Models (NBM) supports highs in the upper 60s to lower 70s for valleys west of the Cascades and in the 60s east of the Cascades. A weak disturbance will move into northern California on Friday. However, expect continued dry weather with only a 5 percent chance for showers, mainly over Siskiyou County. Saturday and Sunday, a couple upper level disturbances move into the area. The first, an upper low/trough tracks into northern California on Saturday. This is followed by another weak low moving down from the north on Sunday. This pattern supports increased chances for showers Saturday and Sunday. Additionally, weak instability and CAPE supports a slight chance (15-20%) for thunderstorms across northern California on Saturday with a 10% chance across southern Oregon. A low chance (10%) for thunderstorms continues on Sunday. && .AVIATION...22/12Z TAFs...The upper level low will track eastward today. This pattern will result in continued scattered to numerous showers, tapering off tonight. For inland areas, expect a mix of VFR/MVFR conditions this morning with local IFR possible (10-15% chance) in valleys, including Medford and Roseburg. Then, expect mainly VFR conditions with local MVFR in heavier showers during the afternoon. Areas of mountain obscurations will continue through the day. Gusty west winds will develop in the afternoon east of the Cascades. Along the coast, widespread MVFR is expected through the day. This pattern will persist into Wednesday evening and night. However, with showers tapering off and partial clearing, expect chances (10-15%) for IFR to develop for inland valleys. && .MARINE...Updated 130 AM PDT Wednesday, April 22, 2026...Below advisory seas continue today as a low pressure system gradually moves inland. Increasing northwest swell follows Wednesday night into Thursday, along with a period of increased south winds which will push conditions just into Small Craft Advisory north of Coos Bay. Additionally, north winds will increase over the waters Thursday and Friday as swell persists. This pattern will result in steep seas in most of the area, especially in the waters south of Cape Blanco on Thursday evening into Friday. && .MFR WATCHES/WARNINGS/ADVISORIES... OR...CA...None. PACIFIC COASTAL WATERS...Small Craft Advisory from 11 AM Thursday to 2 AM PDT Friday for PZZ356-376. Small Craft Advisory from 11 PM this evening to 2 AM PDT Friday for PZZ350-370. && $$

535 FXUS66 KEKA 220726 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 1226 AM PDT Wed Apr 22 2026 .SYNOPSIS...Showers will continue to taper off today. Dry weather is expected Thursday and Friday with chilly temperatures likely. A few rain showers and interior thunderstorms are possible this weekend and into early next week. && .DISCUSSION...The area of low pressure continues to move onshore, and will continue to bring a few lingering showers through the morning. Some breaks in the clouds will be possible by the afternoon as drier air moves in and high pressure starts to build. Lingering moisture from recent rains will likely bring fog in many of the interior valleys tonight. Still, some of the coldest areas, especially in interior Mendocino and Trinity, could see temperatures drop into the low to mid 30s tonight and possibly Thursday night. Frost Advisories may be needed should this trend continue. Interior high temperatures will rebound into the 70s for most interior valleys Thursday and Friday. This weekend, an upper low approaches southern California while a trough digs into the Pacific Northwest. Additional moisture and cooler temperatures aloft could bring a few showers and isolated thunderstorms to the interior. NBM is giving only a 10-15% chance for over a half inch of rain for the interior areas, so little to no impacts are expected. Wetting rain (>0.1") also looks unlikely with only around a 20-30% chance across the area. JB && .AVIATION...Showers have mostly exited the area Tuesday evening with lingering instability keeping ceilings elevated, allowing for mostly MVFR to VFR conditions. Further scattering is expected during the day Wednesday alongside mostly VFR conditions all across the area. There is a slight chance (30%) of some MVFR mist and ceilings along the coast Wednesday night into Thursday, but otherwise conditions will remain mostly favorable. /JHW && .MARINE...Gentle winds have died down and shifted westerly in the wake of a passing storm system. The current sea state is moderately steep around 6 feet, mostly made of decaying short period seas and a mid period westerly swell. SUch moderate conditions will persist or even ease through the day Wednesday. Northerly winds will begin to increase by Thursday, especially int he southern waters with gusts over 25 kts in the lee of Cape Mendocino. Short period seas will quickly build over 8 feet in response to the winds. Stronger breezes will push close to shore Thursday evening, at least briefly. Similar winds will most likely continue into the end of the week but are more likely to remain only in the outer waters. /JHW && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory from 2 PM Thursday to 2 AM PDT Friday for PZZ455. Small Craft Advisory from 8 AM Thursday to 5 AM PDT Friday for PZZ475. && $$ NOTE: The full forecast discussion is now regularly issued between 10 am/pm and 1 pm/am. Additional updates will be issued as needed. Visit us at https://www.weather.gov/eureka Follow us on Facebook and Twitter at: https://www.facebook.com/NWSEureka https://www.twitter.com/NWSEureka For forecast zone information see the forecast zone map online: https://www.weather.gov/images/eka/zonemap.png

480 FXUS66 KMTR 220505 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 1005 PM PDT Tue Apr 21 2026 ...New SHORT TERM, LONG TERM, AVIATION, MARINE... .KEY MESSAGES... Updated at 1004 PM PDT Tue Apr 21 2026 - Cool conditions Wednesday with lingering showers through the morning - Seasonal temperatures and dry conditions arrive Thursday - Monitoring potential rain and drizzle this weekend into the early part of next week && .SHORT TERM... Issued at 1004 PM PDT Tue Apr 21 2026 (Tonight through Thursday) It was a pretty active day on Tuesday with quite a bit of lightning reported across the Bay Area and Central Coast, and a funnel cloud reported near Fremont. The chances for convection have basically shut down as with the lack of solar heating, and while lingering isolated showers are possible through the rest of the morning, not expecting convection to be an issue through Wednesday. Beyond the lingering showers, skies will be generally clearing Wednesday morning with mostly sunny conditions and a gentle onshore breeze developing by the afternoon hours. Low temperatures this morning range from the upper 30s to the middle 40s in the inland valleys, to the upper 40s and lower 50s near the coast and the Bays. High temperatures on Wednesday are close to the upper 50s to the middle 60s in the lower elevations, with a slight warming gradient towards the inland valleys, and the upper 40s to middle 50s at the higher elevations. && .LONG TERM... Issued at 1004 PM PDT Tue Apr 21 2026 (Thursday night through next Tuesday) Temperatures will warm slightly for Thursday and Friday as a barely noticeable ridge sets up over the region, with highs in the lower elevations range from the lower 60s to lower 70s, close to or slightly below the seasonal averages. Into the weekend, another trough will come into the region and cause temperatures to dip again, introducing slight chances for light rain and drizzle that are expected to continue through the middle of next week. The latest CPC outlook leans towards precipitation totals above the seasonal averages heading into the first week of May, with the note that this late into the spring, the daily seasonal average rainfall at downtown San Francisco falls around two or three hundredths of an inch. && .AVIATION... (06Z TAFS) Issued at 1004 PM PDT Tue Apr 21 2026 Mid to high level clouds are expected through the night and into Wednesday, with spotty and inconsistent low clouds possible. Showers will linger into the night, but chances will continue to decrease until the early morning where another wave of showers moves along/adjacent to the low pressure center. As these morning showers move through, expect multiple shifts in winds specifically around the SF Bay. Rain rates will lead to modest reductions in visibilities from this wave of rain. These showers exit into the afternoon as moderate westerly winds build and skies begin to clear. Winds weaken into Wednesday night, becoming light and variable in the inland areas, while sites near the ocean see more northerly winds. Vicinity of SFO...Spotty, non-impactful showers are beginning to dissipate. Mid-level clouds linger across the area into the night with west winds turning more southwest as the low center arrives. Shower activity returns as the low center focuses over the SF Bay into Wednesday morning, and the winds will become shifty and variable. Showers exit into early afternoon as winds turn southwest, then west-northwest for the late afternoon. Winds will ease into Wednesday night and turn northwest. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...Despite the unsettled weather, KMRY and KSNS should mainly expect VFR conditions this TAF period with a brief period of MVFR conditions brought on by passing rain showers. The rain Wednesday morning should remain light and will cause CIGs to lower. After the last shower passes through however, the cloud bases will begin to lift. The onset of the rain is an estimation, therefore there is a possibility it may begin slightly earlier or later. This will be updated as needed. && .MARINE... (Tonight through next Monday) Issued at 1004 PM PDT Tue Apr 21 2026 Light pop-up showers are moving through the waters, but offer little impacts. Additional showers will be possible into Wednesday morning but these chances erode into that afternoon. As the weather breaks on Wednesday, winds will shift to a moderate NW breeze, before increasing to a fresh breeze on Thursday. Winds and seas ease into the weekend. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...Small Craft Advisory from 3 AM to 3 PM PDT Thursday for Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...DialH LONG TERM....DialH AVIATION...Murdock/AN MARINE...Murdock Visit us at www.weather.gov/sanfrancisco Follow us on Facebook, X, and YouTube at: www.facebook.com/nwsbayarea x.com/nwsbayarea www.youtube.com/nwsbayarea

001 FXUS66 KOTX 220757 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 1257 AM PDT Wed Apr 22 2026 .KEY MESSAGES... - Increasing westerly winds and widespread rain showers will be seen through Wednesday evening. Thunderstorms are possible through early Wednesday morning. - Widespread moderate rain Wednesday will bring potential for small stream and urban flooding in Southeast WA. - Strong wind gusts continue through Wednesday and into early Thursday morning. && .SYNOPSIS... Unsettled weather returns Tuesday evening into Wednesday with potential for moderate rain, thunderstorms, and gusty winds. Main risks with thunderstorms will be gusty outflow winds, small hail, and infrequent lightning. Moderate rainfall on Wednesday could result in small stream flooding over the Palouse. Gusty winds will continue through Thursday. Conditions trend drier heading into the weekend. && .DISCUSSION... Today through Thursday: The upper level low has moved inland, bringing active weather to the Pacific Northwest that will continue through Thursday night. The incoming trough paired with warm air left in the wake of the trough has resulted in thunderstorm chances across the area. While the highest chance for thunderstorms has passed, there remains a 10-20% chance for thunderstorms overnight and into later this morning. Main impacts with these thunderstorms will be gusty outflow winds up to 40+ mph and small hail. Afternoon thunderstorm chances continue on Thursday, though will be confined to far eastern Washington and the Idaho Panhandle as the low pressure system moves northeastward. Alongside thunderstorms, this system will also bring widespread rain showers. In particular, a deformation band setting up looks to bring moderate rainfall to southeastern Washington and the Idaho Panhandle. 24-hr rainfall totals through late tonight show this area receiving 0.5-0.75 inches of precipitation, with localized higher totals near 1 inch in areas such as the Palouse and in the mountains. The Palouse receiving this rainfall in particular will be a concern, especially since soils are already saturated and the area has already seen flooding issues earlier in the year. As a result, a Flood Watch has been issued for the Palouse area through tonight. Main impacts will be rises on rivers and streams, and possible minor small stream and urban flooding in poor drainage areas. Other specific areas that are expected to or already seeing flooding include Kootenai River at Bonners Ferry, and Stehekin River. Kootenai River is expected to reach Action Stage later today, while Stehekin River has experienced ongoing flooding issues. With the frontal passage, winds will increase Wednesday afternoon, especially across the Cascades, Okanogan Valley and Highlands, Waterville Plateau, Moses Lake, Basin, and northern Blues areas, with gusts 35-40 mph expected and locally higher wind gusts near 45- 50 mph. Areas that will experience the strongest winds with gusts near 45-50 mph include the Moses Lake, Wenatchee, Waterville Plateau, and Lower Garfield and Asotin county areas. A Wind Advisory has been issued for these areas. Main impacts include choppy waters on any lakes, driving impacts to high profile vehicles, blown objects, and damage to tree branches. The advisories will end tonight and early tomorrow morning, but continued elevated winds will continue through Thursday night. Additionally, high temperatures will drop considerably, nearly 15-20 degrees, from yesterday to today. Low temperatures will not see quite as dramatic a drop, though it will still be noticeable at 10-15 degrees. Friday through Sunday: As the low pressure moves into the northern central US and a trough strengthens off the coast of Canada, dry conditions will be seen through the weekend. The one exception will be showers in mountain areas due to orographic lift. Clusters are in disagreement about whether the low will retrograde westward as it interacts with another low off the California coast, so the main message right now is that there will overall be a warming and drying trend through the weekend. /AS && .AVIATION... 06Z TAFS: A system moving through will result in rain showers, lowered ceilings, and gusty winds through the night and into tomorrow. Radar shows rain showers about 2 hours out. Rain is projected to continue through the forecast period for all sites but MWH and EAT, where PoPs decrease at 18Z. Chances (10-20%) for thunderstorms throughout the forecast area continue through around 15Z, but there isn`t enough confidence to include them at any specific terminal. A slight decrease in winds combined with a moist boundary layer will result in MVFR/IFR conditions for GEG, SFF, COE, and PUW starting around 12-14Z. Timing on when ceilings will lift is uncertain, but HREF has MVFR conditions returning right near the end of the TAF period around 02-04Z. There is less confidence in ceilings dropping at LWS, MWH, and EAT due to stronger winds persisting through the night. Should any thunderstorms form, main impacts to terminals will be gusty outflow winds and small hail. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Low to moderate confidence in the timing of rain starting at each TAF site. High confidence in rain at each TAF site through at least 18Z. Low confidence in timing for ceilings lifting at GEG, SFF, COE, and PUW. Most impactful alternate scenario would be a thunderstorm directly impacting a terminal, resulting in amendments. /AS ----------------------- Confidence descriptors: Low - Less than a 30 percent chance Moderate - 30 to 70 percent chance High - Greater than a 70 percent chance For additional probabilistic information for NWS Spokane airports,please refer to the Aviation Dashboard on our webpage: https:/www.weather.gov/otx/avndashboard && .Preliminary Point Temps/PoPs... Spokane 55 39 56 35 54 33 / 100 20 40 20 20 10 Coeur d`Alene 51 37 52 33 52 31 / 100 50 60 30 20 10 Pullman 46 37 50 33 51 32 / 100 60 70 40 30 10 Lewiston 52 42 55 39 56 36 / 100 70 60 30 20 10 Colville 66 38 60 33 57 31 / 80 10 30 10 20 10 Sandpoint 51 37 50 33 50 31 / 100 60 80 50 30 10 Kellogg 49 37 48 33 49 30 / 100 80 90 50 50 10 Moses Lake 67 43 65 40 62 38 / 90 20 20 10 10 0 Wenatchee 63 45 63 42 61 43 / 70 10 10 0 10 0 Omak 71 42 64 38 61 36 / 40 20 0 0 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...Flood Watch from 5 AM PDT early this morning through this evening for Washington Palouse. Wind Advisory from 8 AM this morning to 5 AM PDT Thursday for Lower Garfield and Asotin Counties. Wind Advisory until 11 PM PDT this evening for Moses Lake Area- Waterville Plateau-Wenatchee Area. ID...Flood Watch from 5 AM PDT early this morning through this evening for Central Panhandle Mountains-Idaho Palouse. && $$

107 FXUS66 KPDT 221024 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 324 AM PDT Wed Apr 22 2026 .KEY MESSAGES... 1. Continued rainfall through Wednesday evening 2. Breezy to windy conditions Wednesday 3. Pattern shift will bring drier and below average temperatures. && .DISCUSSION... Current radar shows some moderate returns over the Basin with ground observations showing 0.12-0.16 inches of rainfall has fallen between Pasco and Walla Walla in the last hour. Elsewhere, radar shows lighter returns with 0.03-0.07 inches of rainfall in the last hour with higher amounts through Meacham. Rainfall is expected to continue through the day today. Models show the closed low to be off the coast of northern California with the leading edge spinning directly across the region. Southeast flow is bringing widespread rain across the region currently and models show precipitation to continue through much of the day. Rainfall amounts will vary across the region with heaviest amounts focused across the Blues and portions of the eastern mountains decreasing lightly as we move westward. Lightest amounts will be found through central and north central OR up to the western portion of the Gorge. NBM QPF shows plenty of precipitation available with 60-90% of the NBM raw ensembles showing rainfall totals nearing 1-1.5 inches over the next 24 hours along the crests of the Northern Blues. The foothills show 40-60% probabilities of near an inch of rainfall while the eastern portion of the Columbia Basin sees 40-60% for 0.80-1 inch while the western portion of the Columbia Basin of WA has 40-60% probabilities of seeing near 0.50 inches of total rainfall. Moving to the Simcoe Highlands of Klickitat and Yakima Kittitas Valleys, 40-60% probabilities these areas will see up to 0.40 inches of rainfall. As for central and north central OR, 60-80% chances of 0.01-0.02 inches. A quick note, snow levels have begun to decrease to around 4500 feet and precipitation above that will likely fall as wet snow. A winter weather advisory is in effect for the Northern and southern Blues for 7 to 12 inches and 4 to 8 inches respectively through 8 PM. A wind advisory is in effect for the Kittitas/Yakima Valleys, Blue Mountain foothills, Columbia Gorge and Basin, North central OR and the Simcoe Highlands of Klickitat County. sustained winds of 25 to 35 mph with gusts of 40 to 55 mph expected. In house models guidance shows a 12-14 mb pressure gradient change over the region will lead in increased winds, especially through the wind prone mountain gaps and foothills. NBM raw ensembles show 70-80% probabilities of the winds occurring with ground observations already showing Kittitas Valley having winds in the 25-30 mph sustained winds and gusts that have already reached 43-45 mph. Winds are expected to remain elevated through 11 PM Wednesday night. As we move into Wednesday night and Thursday morning the upper level low begins to move inland and over the region. With the low off now to the east and the semi formed Rex block to the west, northerly flow will begin to dominate over the region. Models show much of the precipitation to be tapering off with only a few lingering showers over the Cascades and eastern mountains. As we move into Thursday, drier conditions will begin to dominate and the north flow aloft will usher in colder air. In could calculations show that temperatures will be anywhere from 10-20 degrees below seasonal average with EFI in agreement. Temperatures Thursday and through the weekend will be in the low to mid 50s across a vast majority of the region with 70-80% probabilities and isolated 60s in the Basin. Models show this pattern to persist through Sunday night ahead of another pattern shift. 90 && .AVIATION /12Z TAFS THROUGH 12Z THURSDAY/... VFR and MVFR conditions expected through the beginning of the forecast period. Rain has been ongoing this evening and will continue to remain through the period causing CIGs to drop to MVFR across many TAF sites after 12-16Z. ALW have a 30% chance of seeing MVFR conditions between 19-23Z due to CIGs and low VIS due to BR. All TAF sites will also see breezy to windy conditions through the period with winds between 20-30 kts and gusts between 30-35 kts. 90 && .HYDROLOGY... Aerial flood watches are in effect for the northern and southern Blue Mountains and the norther and southern Blue Mountain foothills through Thursday morning. Umatilla at Pendleton and Gibbon is expected to reach minor flood stage Thursday, John Day at Service Creek, Walla Wall near Touchet, Naches near Cliffdell and Naches are all expected to reach bankfull by Thursday as well. Moderate to heavy rains through the area through Wednesday will cause these rivers to rise. 90 && .Preliminary Point Temps/PoPs... PDT 51 38 58 37 / 100 40 40 20 ALW 51 41 58 39 / 100 50 60 30 PSC 61 42 65 39 / 100 20 30 10 YKM 63 40 67 39 / 80 0 10 10 HRI 55 40 62 39 / 100 20 20 10 ELN 56 39 59 35 / 80 10 10 10 RDM 52 26 61 28 / 50 10 0 0 LGD 46 36 52 34 / 100 80 50 40 GCD 46 31 54 32 / 90 70 20 20 DLS 58 42 65 41 / 80 10 0 0 && .PDT WATCHES/WARNINGS/ADVISORIES... WA...Wind Advisory until 11 PM PDT this evening for WAZ024-027>029- 521. Flood Watch through Thursday evening for WAZ029. Winter Weather Advisory until 8 PM PDT this evening for WAZ030. Wind Advisory until 11 PM PDT this evening for WAZ026. OR...Wind Advisory until 11 PM PDT this evening for ORZ041-044-507- 508-510. Flood Watch through Thursday evening for ORZ502-507-508. Winter Weather Advisory until 8 PM PDT this evening for ORZ502- 503. && $$ DISCUSSION...90 AVIATION...90 HYDROLOGY...90

549 FXUS65 KREV 220744 AFDREV Area Forecast Discussion National Weather Service Reno NV 1244 AM PDT Wed Apr 22 2026 .KEY MESSAGES... * Scattered snow showers will continue through early morning in the Sierra, continuing travel impacts and delays. Isolated thunderstorms could bring brief high snowfall rates and embedded lightning. * A chilly start to Thursday will lead to a drying and warming trend Thursday and Friday. Chances for afternoon showers return this weekend, mainly over the mountains. && .DISCUSSION... The final waves of snow will make their way across the Sierra this morning, with a more scattered showery pattern emerging by late morning. The nature of these showers will be more convective, and they could bring a brief heavy burst of snow as they pass. Until the showers clear out of the region later today, check with CalTrans and NDOT for the latest road conditions before heading out the door. Otherwise, chilly northerly breezes will carry a colder airmass, which will be noticeable this morning and Thursday morning. As of Thursday a warming trend ensues, and will keep us on the warmer side of spring temperatures into Friday. Despite this reprieve in the cold, damp weather pattern of recent, this warmup will be subtle and gradual. In fact, a trough pattern situated along the West Coast will keep temperatures near average as yet another system swings into view for the weekend. With temperatures wanting to fluctuate, instability may build in this weekend, allowing showers and storms along the Sierra to develop to heights that would support the growth of small hail and graupel along with occasional lightning strikes. HRICH && .AVIATION... * Snow showers will continue to fall for KTVL and KTRK into 18z today, although accumulations should be limited to an inch or two on the runways. KMMH has potential, especially between 12z and 18z, to see up to 3 additional inches of fresh snowfall. Pockets of LLWS and turbulence will persist, especially across Sierra terminals through around 15z. * Surface winds will taper this morning, with gusts to 20 mph returning to valley terminals this evening. VFR conditions will prevail Thursday. HRICH && .REV Watches/Warnings/Advisories... NV...Winter Weather Advisory until 5 PM PDT this afternoon NVZ002. CA...Winter Weather Advisory until 5 PM PDT this afternoon CAZ072-073. && $$

755 FXUS66 KSTO 211927 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 1227 PM PDT Tue Apr 21 2026 For additional details on weather and expected impacts over the next 7 days, please visit weather.gov/sto/briefing. .KEY MESSAGES... - Storm system brings moderate to heavy rain and mountain snow, thunderstorms, cooler temperatures and breezy winds today through Wednesday morning. Lingering light showers and thunderstorms into Wednesday afternoon. - Winter Storm Warning in effect through Wednesday afternoon - Mostly dry weather, with the potential for light mountain showers late this week into early next week. Isolated mountain thunderstorms possible on Saturday. && .DISCUSSION... ...Today through Wednesday... An upper level low will continue to move onshore today and into early Wednesday, bringing widespread showers, moderate to heavy mountain snow, gusty winds and thunderstorms to the region. Latest afternoon radar shows scattered showers across the area, with isolated thunderstorms developing across portions of the Valley. Precipitation is expected to continue through the rest of the day, with the potential for afternoon and evening thunderstorm development. WPC guidance indicates additional precipitation amounts of 0.25 to 0.60 inches in the Valley, with 0.50 to 1.50+ inches in the foothills and mountains. As the upper low moves inland, that is where our greatest chance for thunderstorms will also be across the region. Atmospheric profiles suggest the potential for strong to severe thunderstorms this afternoon and evening, mainly across the northern San Joaquin Valley and adjacent foothills. Main threats with thunderstorms will be heavy rain, dangerous lightning, small hail, and brief funnels/weak tornadoes. Moderate to heavy mountain snow will bring travel impacts across the northern Sierra and southern Cascades today. A Winter Storm Warning remains in effect above 5000 feet until 5 PM PDT Wednesday. Heaviest snow, with potential snowfall rates of 1-2" per hour, will be today, where some convective snow bands may develop. Any convective snow bands that develop may also lower snow levels briefly, so some brief, heavy wet snow showers may be possible below 5500 feet. Additional snowfall accumulations of up to 6-12 inches are expected above 5000 feet, with up to 18 inches at the highest peaks, and Minor accumulations of 2 inches down to 4500 feet are in the forecast today through Wednesday. Snow levels will lower to around 4500-5500 feet by early Wednesday, with mostly light lingering snow showers up to 1-3 inches expected. Shower activity decreases after Wednesday morning, with mainly light lingering mountain showers possible through the afternoon and early evening. There is also a 10-15% chance for thunderstorms on Wednesday. ...Thursday through Monday... By Thursday, generally dry conditions will overtake the area and continue into the weekend. A trough will build in the EPAC however, which will introduce chances for light mountain rain and snow showers Friday through early next week. Latest NBM also depicts a 10-25% chance for mountain thunderstorms on Saturday, with the highest chances in Shasta County. High temperatures will fluctuate Thursday- Sunday, with gradual warming Thursday and Friday then gradual cooling by the weekend. Highs will be in the 60s to 70s in the Valley and foothills, with cooler low to mid 40s to 50s for the higher elevations. && .AVIATION... A weather system is currently moving through interior NorCal, bringing Valley rain and t-storms and mountain snow. Widespread MVFR conditions due to low ceilings at all TAF sites next 12-18 hours. Occasional breaks in clouds will allow for rapid changes in visibilities, and any storm that develops will lower viz/ceilings to IFR/LIFR conditions. Best chances for t-storms through 06z Wednesday. Snow levels around 5000 feet next 24 hours. Surface wind gusts up to 25 knots in Valley; up to 35 knots in higher terrain. && .STO WATCHES/WARNINGS/ADVISORIES... Winter Storm Warning until 5 PM PDT Wednesday for Lassen Volcanic NP-Sierra (Cal-Tuo) Above 5000 ft-Sierra (El Dorado- Amador) Above 5000 ft-Sierra (Sierra-Placer) Above 5000 ft- Sierra (Tehama-Plumas) Above 3000 ft. && $$

442 FXUS65 KMSO 220749 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 149 AM MDT Wed Apr 22 2026 .DISCUSSION... KEY MESSAGES: - Widespread rain develops today, followed by much cooler temperatures and a return to winter driving conditions over mountain passes by Thursday. - A potentially impactful band of heavy, wet snow could disrupt the Thursday and Friday morning commutes across western Montana valleys. The ridge of high pressure that brought summer-like conditions has moved out as a strong low pressure system moves onshore across the Pacific Northwest. Scattered rain showers will spread from south to north across the Northern Rockies through the day today. A cold front associated with this system will move across the region this morning, bringing brief moderate to heavy rain and gusty west winds between sunrise and mid-morning. Wind gusts of 25 to 35 mph are expected as the front passes. Widespread precipitation will continue through Thursday night. The highest moisture amountswith some areas seeing over an inch of rain and melted snoware expected along the Clearwater Mountains and the Continental Divide. Behind the front, temperatures will plummet 30 to 40 degrees compared to Tuesdays highs. As cold air settles over the region, snow levels will drop rapidly tonight into Thursday. By Thursday morning, snow levels will fall to between 3,000 and 4,000 feet. This will bring wet, accumulating snow to higher valleys and mountain passes, including Lookout, Lolo, Homestake, and MacDonald passes. Travelers should prepare for slushy roads and winter driving conditions along the Continental Divide. Winter Weather Advisories are in effect from 9 PM this evening through noon Friday. We continue to track a potential narrow band of heavy precipitation that could impact the Thursday morning commute across Northwest Montana. If this band develops over the valleys, heavy wet snow will cause low visibility, slushy roads, snapped tree branches, and isolated power outages. A second band of snow may develop over West-Central Montana Thursday night, impacting the Friday morning commute. Detailed weather models continue to show these bands, leading to higher confidence in these impacts. The cool and showery pattern will persist through the weekend as a broad area of low pressure remains over the western United States. && .AVIATION...A cold front will move across the region this morning and afternoon, bringing brief moderate to heavy rain and gusty west winds between sunrise and mid-morning. Wind gusts of 25 to 30 kts are expected as the front passes. The front will move through the region between 22/1800Z and 22/2100Z. Expect mountain obscurations throughout western Montana and north-central Idaho today. Snow-levels will lower to valley floors across northwest Montana tomorrow morning, potentially bring moderate to heavy snow, impacting KGPI with accumulating snowfall and low visibility. Another narrow band of moderate to heavy precipitation may bring snow and low visibility to KMSO and KHRF Friday morning. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...Winter Weather Advisory from 6 PM this evening to noon MDT Friday for Bitterroot/Sapphire Mountains...Butte/Blackfoot Region...Potomac/Seeley Lake Region. Winter Weather Advisory from 6 PM this evening to 6 PM MDT Thursday for West Glacier Region. ID...Winter Weather Advisory from 6 PM MDT /5 PM PDT/ this evening to noon MDT /11 AM PDT/ Friday for Eastern Lemhi County... Southern Clearwater Mountains...Western Lemhi County. && $$

888 FXUS65 KBOI 220933 AFDBOI Area Forecast Discussion National Weather Service Boise ID 333 AM MDT Wed Apr 22 2026 .KEY MESSAGES... - Much cooler today with widespread showers, isolated thunderstorms, gusty winds, and snow levels 4500 to 5500 feet. - Precipitation totals of 1 to 2 inch in the mountains, 0.25 to 1.0 inch in the valleys. - Snow accumulations of 10 to 20 inches on the peaks above 6000 feet, highest on the northwest facing peaks. - Remaining cool and unsettled through the weekend and into early next week. && .SHORT TERM /Through Friday Night/... The center of an upper low will move overhead this morning, bringing widespread rain and mountain snow. After steady precipitation this morning, it will become more showery this afternoon as the low center departs. A slight chance of thunderstorms will also develop, mainly on the Idaho side. The mountains will continue to see heavier amounts this afternoon as orographic lift is enhanced under moderate westerly flow aloft. Snow levels will be 4500-5500 feet, limiting significant snow amounts to higher peaks. Temperatures today will be 20-30 degrees cooler than yesterday, with highs around 10 degrees below normal. The departing low will bring gusty winds to the area, especially across southeast Oregon and far southern Idaho where frequent gusts of 25-40 mph are expected. A few gusts to 45-50 mph are also possible in these areas. A trailing shortwave trough will move through tonight, bringing additional showers. Precipitation chances will decrease from west to east overnight as the trough exits the area. Precipitation totals today through tonight will be significant, with most lower elevations picking up 0.25-1.0 inch of rain, with higher totals more likely near the foothills. In the Treasure Valley, there is a 10-30% chance of 1 inch of rain or more, with a 40% chance near the foothills. Precipitation totals of 1-2 inches will be common over the mountains, with locally higher amounts on windward slopes. Above 6000 feet, this will be in the form of heavy snow with 10-20 inches expected. From 4500-5500 feet, generally less than 1 inch of snow is anticipated. Northwest flow will persist across the area Thursday and Friday with a couple of shortwave troughs brushing our northern area. This will keep temperatures 5-10 degrees below normal with gusty afternoon winds, strongest Thursday across southern Idaho where gusts 30-45 mph will occur. The troughs will keep a 40-80% chance of snow across the central Idaho mountains, with less than a 20% chance of precipitation elsewhere. Snow amounts will be light. Weak instability will support a 10-20% chance of thunderstorms Thursday afternoon across the mountains. Additionally, low temperatures at agricultural locations in the lower valleys will dip into the low to mid 30s Thursday and Friday nights, resulting in a risk of frost/freeze. && .LONG TERM /Saturday through Wednesday/... Cool and unsettled conditions are expected through the weekend and into early next week as troughing persists over the PacNW. Temperatures will remain a few degrees below normal through Monday. The airmass will gradually modify and warm for Tuesday and Wednesday as the trough weakens and becomes disorganized. Though moisture will be limited, the unstable cool air aloft will help to generate showers over the higher terrain each day, with lower chances for the valleys. Snow levels will range from 4500-6500ft MSL, with the lower levels for the north and higher levels across the south. Models hint at weak ridging developing mid to late next week, which would support warming and drying across the forecast area. && .AVIATION /06Z Wednesday through Thursday/... Issued 1240 AM MDT TUE APR 21 2026 Numerous showers and isolated thunderstorms. Low VFR-IFR in rain, IFR-LIFR in mtn snow. Mtns obscured. Snow Levels: 4500-6000ft MSL. Surface winds: SW-NW 10-25 kt with gusts to 20-35 kt. Gusts decreasing early this morning before returning late AM. Winds aloft at 10kft MSL: W-NW 20-40 kt. KBOI...Rain showers continuing today, with periods of MVFR conditions throughout the morning hours. Showers ending around Thu/07Z. Surface winds: W-N 8-18 kt. Gusts to 25-30 kt returning late morning through afternoon. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...None. OR...None. && $$ www.weather.gov/Boise Interact with us via social media: www.facebook.com/NWSBoise www.x.com/NWSBoise SHORT TERM...ST LONG TERM....SH AVIATION.....SH

849 FXUS65 KLKN 220701 AAA AFDLKN Area Forecast Discussion...Updated National Weather Service Elko NV 1201 AM PDT Wed Apr 22 2026 .KEY MESSAGES... * Periods of precipitation today * Much cooler today * Isolated thunderstorms in Northern Elko County this afternoon into this evening * Warming trend Thursday and Friday && .UPDATE... Issued at 1201 AM PDT Wed Apr 22 2026 The current forecast is on track. No updates are planned. && .DISCUSSION... (Today through Tuesday) WEATHER PATTERN OVERVIEW: A few rumbles of thunder are possible in Northern Elko County this afternoon into this evening. Snow levels will climb to around 6,000 feet this afternoon. Low elevation snow is possible this morning, however it will be short lived due to warm ground temperatures and daytime temperatures above freezing today. tomorrow. Mountain tops could see 3 to 5 inches of new snowfall today, especially in the Ruby Mountains and the Jarbidge Wilderness area. Highs this afternoon will be in the 40s and low 50s, with overnight lows in the 20s. Precipitation potential is expected to linger through this evening, before clearing entirely overnight. A zonal flow pattern is expected to end the week, allowing daytime temperatures to return to the 60s for Friday and Saturday. Model spread is still highly variable after Friday, however the signal for more showers this weekend into next week persists and confidence is slowly increasing. FORECAST CONFIDENCE & DEVIATIONS: High confidence in wet and cooler weather today. High confidence in seasonal temperatures to end the week. Low confidence in showers this weekend. && .AVIATION... Ceilings are likely to drop below VFR thresholds in and near precipitation today. Visibilities may also drop below VFR limits during showers today. && .LKN Watches/Warnings/Advisories... High Wind Warning until 2 AM PDT this morning NVZ035. && $$ DISCUSSION...94 AVIATION...94