134 FXUS66 KSEW 230303 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 803 PM PDT Wed Apr 22 2026 .SYNOPSIS... A dry and warmer pattern will begin to unfold for the second half of the week and into the weekend. No impactful weather is expected in the next several days. && .SHORT TERM /TONIGHT THROUGH FRIDAY NIGHT/... Radar activity is winding down this evening as the low continues to move to the south and east. Otherwise, no major updates have been made and the previous discussion can be found below. See the aviation sections for updates there. Winds and any remaining shower activity will dissipate overnight into early Thursday. A drier pattern will set up starting Thursday as an upper level ridge continues to build over the NE Pacific Ocean. A shortwave trough over Eastern Washington may bring light precipitation to the Cascades Thursday into Friday. With snow levels between 3000-4000 ft, light mixed precipitation or snow is possible. However, no significant impacts are expected. A cloudy start expected Thursday morning, but clouds will scatter out in the afternoon giving way for mostly clear skies to partly cloudy skies in the afternoon. High temperatures will be in the upper 50s along the coast and low 60s in the interior. A warmer day with sunny skies and breezy winds is in store on Friday with temperatures peaking in the low to mid 60s. && .LONG TERM /SATURDAY THROUGH WEDNESDAY/... Generally dry and warm conditions continue into the weekend with mostly clear skies across the lowlands and coast. Daytime temperatures over the weekend will peak in the mid 60s along the coast; as for the interior, temperatures will peak in the upper 60s to low 70s. Models do continue to highlight a series of shortwaves moving across area this weekend and into early next week. The Cascades will see increased cloud coverage and the small chance (10- 25%) of light precipitation. Outside of the mountains, conditions are still trending dry. Slightly cooler early next week with high temperatures in the 60s. 29 && .AVIATION... North to northwesterly flow aloft will continue into Thursday as an upper level trough gradually shifts east of the area and an upper ridge remains centered offshore. The air mass is moist and generally stable with widespread MVFR ceilings. VFR expected areawide by Thursday afternoon. KSEA...MVFR is expected to persist overnight. There`s around a 60% chance of some higher MVFR ceilings on Thursday morning before VFR returns by late morning. Surface winds southerly 8 to 12 knots easing to under 8 knots late tonight. && .MARINE... Light onshore flow will turn more northerly or weakly offshore Friday into the early portion of the weekend with broad surface ridging over western Canada and lower pressure over the Pacific Northwest. Ridging weakens early next week with light onshore flow resuming. Seas will build and steepen over the coastal waters 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. && .HYDROLOGY... No river flooding is expected in the next seven days. && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...Small Craft Advisory until 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-Grays Harbor Bar. Small Craft Advisory until 8 PM PDT this evening for Puget Sound and Hood Canal. && $$

781 FXUS66 KPQR 222204 AFDPQR Area Forecast Discussion National Weather Service Portland OR 259 PM PDT Wed Apr 22 2026 .SYNOPSIS...Rain shifts south this afternoon, diminishing this evening. Morning clouds give way to mostly sunny skies Thu afternoon as conditions are expected to trend warmer and drier later this week. Temperatures generally expected to remain near to slightly above seasonable normals for late April. Chances for showers increase this weekend, particularly over the higher terrain of the Cascades and foothills. Similar conditions persist into early next week. && .DISCUSSION...Now through Wednesday...Rain associated with a weak backdoor cold front will continue to slide south this afternoon, while the upper low shifts east across Idaho and into the northern Rockies, allowing for precipitation to gradually diminish by this evening. A few lingering showers will exist through tonight, mainly over the Oregon Cascades and foothills, and into the southern Willamette Valley. Snow levels will remain near the passes with 1-2 inches of snowfall possible through late this afternoon. Conditions are expected to trend warmer and drier Thursday and Friday as an upper level trough dropping out of Canada remains east of the Pacific NW. Expect morning clouds will give way to mostly sunny skies Thu afternoon with temperatures trending back toward seasonable norms, with further warming likely into Friday. Early morning min temperatures are expected to remain elevated enough into the upper 30s to lowers 40s to limit any widespread frost, although could be flirting with some frost in the Upper Hood River Valley where there is around a 50% chance of temps falling to 36 F or below. The amplified upper level pattern continues into Friday with an anomalously steep upper level ridge over the NE Pacific pushing north into Alaska, undercut by the subtropical jet moving into southern California. With a weaker upper ridge, most ensemble clusters are showing shortwave troughing dropping out of western Canada across the Pacific NW by this weekend. But, conditions are still expected to remain mostly dry with seasonable to slightly warmer than normal temperatures through Sunday. There is potential for shower activity over the central Oregon Cascades Saturday afternoon: 20-40% PoPs with a 10-20% chance of thunder. Depending on the strength of the upper shortwave and amount of mid-level moisture, chances for showers may increase on Sunday, with around a 10-25% chance of rain showers across the lowlands into Sunday afternoon. Uncertainty continues into early next week, but ensembles do indicate weak, perhaps transient, upper level ridging works its way across the Pacific NW. Afternoon high temperatures generally will fall into the range from the mid-60s to lower 70s through the middle of next week, with afternoon shower chances likely confined to the higher terrain. /DH && .AVIATION...A frontal system continues to move through the airspace from north to south, bringing rain and lowering conditions to VFR/MVFR at a few terminals. Expect rain and mixes of VFR/MVFR conditions at inland terminals to persist until 00Z Thu, followed by VFR and dry conditions through at least 18Z Thu. As for coastal terminals, rain showers have mostly tapered off at all coastal terminals, but MVFR conditions still linger. Most guidance suggests that MVFR conditions at the coast will persist through the TAF period. With NBM only suggesting a 30-40% chance of MVFR CIGs beyond 06Z Thu and higher chances before, there is high confidence that MVFR will linger until 06Z Thu, and lower confidence through the rest of the TAF period. Current southwesterly to south-southwesterly flow at the surface will gradually shift to mostly southerly by 07-09Z Thu. Winds remain around 8-12 kt with gusts up to around 20 kt, but will gradually decrease to under 8 kt after 03Z Thu. Winds will likely shift back to southwesterly to westerly around 18Z Thu. KPDX AND APPROACHES...Rain and a mixed bag of VFR/MVFR conditions continue until 00Z Thu, then VFR and dry conditions through the rest of the TAF period. Breezy southwesterly to south- southwesterly winds of 8-12 kt with gusts up to around 20 kt, then weakening to sustained winds under 8 kt after 03Z Thu. ~12 && .MARINE...Winds and seas have increased over the coastal waters today with a cold front still moving through the region. A northwest swell continues to push seas to around 9 to 11 ft with westerly to northwesterly winds around 15 to 20 kt and gusts up to 25 kt over the central and northern outer waters. The southern waters have also seen increasing winds and seas through the afternoon. Seas will peak between 9-13 ft this evening into tonight at 10 to 12 seconds, bringing steep and hazardous seas. The highest seas will remain over the northern outer waters beyond 20-30 nm. Winds will gradually decrease this evening into tonight, however seas will remain elevated. Expect seas to fall below 10 ft by late Thursday afternoon and continuing to subside into Thursday night. A Hazardous Seas Warning remains in effect for the outer waters north of Cape Falcon until 5 AM PDT Thursday, followed by a Small Craft Advisory from 5 AM to 5 PM PDT Thursday. The remaining marine zones north of Cape Foulweather have Small Craft Advisories in effect until 5 PM PDT Thursday. For the marine zones south of Cape Foulweather, a Small Craft Advisory will be in effect from 5 PM Wednesday to 5 PM PDT Thursday. For the Columbia River Bar, seas will increase to around 9 to 10 ft over the main channel late today and remain elevated into early Thursday. As a result, a Small Craft Advisory remains in effect until 5 PM PDT Thursday. ~12/23 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. PZ...Small Craft Advisory until 5 PM PDT Thursday for PZZ210-251-252- 272. Small Craft Advisory until 5 PM PDT Thursday for PZZ253-273. Hazardous Seas Warning until 5 AM PDT Thursday for PZZ271. Small Craft Advisory from 5 AM to 5 PM PDT Thursday for PZZ271. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland

648 FXUS66 KMFR 222037 AFDMFR Area Forecast Discussion National Weather Service Medford OR 137 PM PDT Wed Apr 22 2026 .DISCUSSION... Key Points: * Remaining showers finish this evening, drier conditions return * Gusty conditions this afternoon east of the Cascades * Next chance for rain Saturday in Northern California/Cascades * Warm, above normal temperatures Thursday through Saturday Current radar shows scattered showers in northern Jackson and Josephine counties and eastern Douglas County. Any remaining showers this afternoon will bring less than 0.10" of rain in these areas and east with less than 2 inches of snow in the Cascades. More mixing has brought stronger winds east of the Cascades through the early evening. Gusts have peaked to 48 mph at Summer Lake so far and general gusts near 30 mph. There is a 45-60% probability to see wind gusts of 35 mph in northern Lake County including at Fort Rock through 6 PM today. Tonight some clearing will occur, and this includes areas east of the Cascades and in the Illinois Valley. Forecast lows from Selma and through Obrien are in the 32-34 degree range. However, the Illinois Valley has received between 0.50"-0.75" of rainfall in the past 72 hours. This moisture will help lower the frost threat, but precautions should still be taken as the coldest hours will bring temps to 36 or cooler where the clearest skies are. By Thursday the upper low will move east out of the area and drier conditions return. Slightly above normal temperatures will be present through the long term as well. The latest runs show a slight increase in rain returning Saturday afternoon for Northern California and east side. There is a 30% probability to see 0.10" in parts of Siskiyou and Modoc counties later Saturday. After a dip in temperatures Sunday, a warming trend starts the next work week. Disagreement in the models comes later Sunday, and this will be monitored. -Hermansen && .AVIATION...22/18Z TAFs...A mix of VFR/MVFR will prevail through the afternoon with lingering showers becoming more widespread this afternoon. Expect terrain obscurations to prevail as well. Gusty winds will continue east of the Cascades into this evening, with winds increase in the valleys west of the Cascades as well. Winds ease later this evening and showers will diminish as drier air moves into the region. Stratus will likely linger over the valleys tonight, which should limit fog development. For areas that do clear, expect chances (10-15%) for IFR to develop for inland valleys. /BR-y && .MARINE...Updated 100 PM PDT Wednesday, April 22, 2026...Below advisory seas continue today as a low pressure system gradually moves inland. Increasing northwest swell follows tonight into Thursday, along with a period of increased west winds which will push conditions just into advisory criteria north of Coos Bay. Additionally, north winds will increase Thursday and Friday as swell persists. This will result in steep seas for most areas, especially south of Cape Blanco 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. && $$

463 FXUS66 KEKA 222029 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 129 PM PDT Wed Apr 22 2026 .SYNOPSIS...Dry weather is expected Thursday and Friday with chilly overnight temperatures and moderate sunny afternoons. A few rain showers and interior thunderstorms are possible this weekend and into early next week. && .DISCUSSION...High pressure is building in across the area and showers continue to diminish, although widespread CU persists. This afternoon there is expected to be an increase in showers over the inland mountains. Any showers that do form should be fairly weak. Tonight some of the interior valleys may see low clouds and/or fog. Valleys that do remain clear will be likely to see near freezing or freezing temperatures. For now it looks areas well away from the coast may see freezing temperatures. So have issued a freeze warning to Trinity, northern Mendocino, and northern Lake county. Have also issued a frost advisory for the remainder of Mendocino and Lake counties and much of Humboldt and Del Norte counties. After a chilly start on Thursday temperatures are expected to warm quickly to around 70 in most of the interior valleys while lingering around 60 at the coast. Thursday night into Friday a few of the inland could see some frost, but at this point it looks like it will mainly be in Trinity county, northeastern Mendocino, and northern Lake counties. Highs Friday are expected to continue warming into the 70s. For the weekend and into early next week a general trough over the west coast is expected to keep temperatures near or below seasonal normals. Saturday an upper level low is moving southeast along the northern Rockies while a second upper low is approaching the central CA coast. There is still a lot of uncertainty on the track and speed of these lows, but it looks like there is the potential for a few thunderstorms over the interior and a slight chance of showers over portions of the area. This pattern looks become more of a general open wave trough Sunday and Monday, although surface weather conditions should remain fairly similar. Even with the trough remaining over the area for several days the probability of over an inch of rain for the 3 days ending Tuesday is less than 50 percent. Inland temperatures are expected to be in the 60s. At the coast this will likely keep the marine layer disturbed enough for quite a bit of sunshine at the coast. At some around the middle of next week the ridge is expected to start building into the area once again. Timing is still uncertain on when this ridge builds back into the area. MKK && .AVIATION...High pressure is building in across the area and showers continue to diminish. This afternoon there is expected to be an increase in showers over the inland mountains. Any showers that do form should be fairly weak. Tonight some of the interior valleys may see low clouds and/or fog. At KUKI there is less than a 25 percent chance of an MVFR or lower CIG form. It is possible some areas along the coast will also see low clouds develop, but at this point it looks like KACV and KCEC will remain VFR for much of the night. Thursday northwest winds are expected to increase along the coast in the afternoon to 10 to 20 kt with some gusts to 25 kt. MKK && .MARINE...High pressure is building in and winds are becoming northerly and starting to increase. These winds are expected to remain less than 10 kt north of Cape Mendocino with 10 to 15 kt south of the cape this evening. Late tonight and Thursday north to northwest winds are expected to gradually increase through the day. There is general model agreement of the winds reach 15 to 20 kt by late afternoon. Stronger winds are expected in the lee of Cape Mendocino where local winds of 25 to 30 kt are expected with a few local gale force gusts. The wind driven waves are expected to build to around 8 feet by Thursday evening south of Cape Mendocino. These will combine with a lingering northwest swell that is slowly diminishing. Friday the stronger northerly winds are expected to push off the coast as an upper level trough approaches the area for the weekend. For the weekend there is some uncertainty on how much the winds will diminish. Currently it generally looks like the winds remain around 10 to 20 kt, but there is certainly the potential for winds to be lighter. Confidence is higher that Monday will see lighter winds. Mid-week it looks like high pressure starts to return and bring stronger winds again. MKK && .EKA WATCHES/WARNINGS/ADVISORIES... CA... Frost Advisory from 2 AM to 8 AM PDT Thursday for CAZ102>106-109-110-112-113-118>120. Freeze Warning from 2 AM to 8 AM PDT Thursday for CAZ108- 111-114-117. 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

269 FXUS66 KMTR 230103 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 603 PM PDT Wed Apr 22 2026 ...New AVIATION, MARINE... .KEY MESSAGES... Updated at 1004 PM PDT Tue Apr 21 2026 - Cool conditions Wednesday with lingering showers through the day - 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 129 PM PDT Wed Apr 22 2026 (This afternoon through Thursday) While not as active as 24 hours ago we still have KMUX is precip mode. Current radar loop this afternoon still shows widely scattered showers around the Bay Area and Central Coast. Afternoon visible satellite shows popcorn city with an extensive CU field blanketing the region. Why the showers? The main storm system from yesterday has exited to the east. On the back side of this system are trialing embedded vort maxes/shortwaves. Those features in conjunction with lingering moisture, daytime heating, and weak instability has led to the showers. That being said, not enough lift or vertically developed storms to generate thunderstorms. This evening and tonight, once the sun sets expect shower activity to quickly diminish and CU field thin. One potential impact tonight will be some developing low stratus and fog. Clearing skies and decreasing winds will allow for some fog development over the inland valleys. Thursday: Dry, warmer, and more sunshine due to weak upper level ridging. Max temps will be in the 60s to mid 70s, which is closer to seasonal averages. && .LONG TERM... Issued at 129 PM PDT Wed Apr 22 2026 (Thursday night through next Tuesday) A few days ago the longer term forecast didn`t look to interesting from a weather impact standpoint, but a trend has emerged over the last 24-36 hrs showing active weather will continue. First and foremost it will not be as dynamic as the system that we just had. However, a previously dry-ish weekend is now trending "wetter". What`s the trend? Subtle ridging aloft is now looking more trough-y with an upper low over the region. The longwave pattern keeps kicking the upper low from yesterday eastward. In its wake subtle ridging is now being replaced by another upstream trough. It now appears enough jet dynamics aloft emerge to shift the broad upper trough to a more pronounced upper low late Thursday into Friday. Heights begin to fall by Friday lowering temps and ushering in more clouds. By Saturday morning an upper low develops off the Central Coast. As such, light drizzle/light rain will return. This set up will persist through early Sunday with drizzle/light rain. Not expecting much accumulation, just some wet ground, clouds, and cooler temps. Another upper low develop early next week bring additional rain chances on Tuesday into Wednesday. Again, not a big storm, just additional moisture. && .AVIATION... (00Z TAFS) Issued at 601 PM PDT Wed Apr 22 2026 Residual light rain is making its way out of a few TAF sites this afternoon. As a result, some sites will see low cloud bases (4500 to 8000 ft) in the earlier portion of the TAF period, but they are expected to lift through the evening. VFR conditions are forecast as the drying trend continues. Winds will be light throughout the night and will increase by tomorrow afternoon with some locations experiencing embedded gusts. Model guidance is hinting at the potential for valley fog in the early morning hours for STS & SJC, however confidence is currently too low to include in the TAF. We will continue to monitor this and update as needed. Vicinity of SFO...Westerly winds will dominate this TAF period at moderate speeds. The winds should become light overnight before picking up again tomorrow afternoon. VFR conditions will persist for the remainder of the day and night. There is some potential for low- level cloud decks tomorrow night around 05Z, though it does not seem impactful at this time. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...Moderate west winds last into the late evening before winds reduce and become light and variable. Low clouds look to form on the mountain tops in the area overnight, but don`t look to affect the TAF sites. Those clouds erode into the early morning with moderate west to northwest winds affecting the region into the late morning. && .MARINE... (Tonight through next Tuesday) Issued at 601 PM PDT Wed Apr 22 2026 Isolated light showers linger across waters this afternoon and will continue to diminish into the early evening. A moderate north breeze will develop this tonight, then increase on Thursday to a fresh northwest breeze. Wind and seas will begin to gradually subside on Friday, continuing into the weekend. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...Small Craft Advisory from 3 PM to 9 PM PDT Thursday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Arena to Pt Reyes 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0- 10 nm. Small Craft Advisory from 3 AM Thursday to 3 PM PDT Friday for Pt Arena to Pt Reyes 10-60 NM. Small Craft Advisory from 3 PM Thursday to 3 AM PDT Friday for Pigeon Pt to Pt Pinos 10-60 NM. && $$ SHORT TERM...MM LONG TERM....MM AVIATION...Navarrete/Murdock MARINE...KR 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

502 FXUS66 KOTX 222352 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 452 PM PDT Wed Apr 22 2026 .KEY MESSAGES... - Rain moves southeastward out of the region Wednesday evening into Thursday. - Gusty northwest winds continue Wednesday night through Thursday evening. - Conditions trend drier Friday through the weekend with cold overnight lows. && .SYNOPSIS... Rain moves southeastward out of the region Wednesday evening into Thursday. Gusty northwest winds continue Wednesday night through Thursday. Dry conditions and partly cloudy skies will prevail Friday through the weekend. Overnight lows will trend colder with temperatures dropping below freezing Thursday night through Saturday night for much of the region. && .DISCUSSION... The band of stratiform precip is gradually moving southeast with rain forecast to continue over Southeast WA and the ID Panhandle through the evening. Ponding of water on roadways and minor field flooding have already been observed over the Palouse with saturated soils limiting the amount of additional rain that can be absorbed into the ground, so a Flood Watch remains in effect for that area through tonight. While precip has ended for Northern and Central WA, gusty northwest winds will persist for those areas and over Southeast WA through tonight and Thursday with sustained speeds of 15 to 25 mph and gusts of 35 to 45 mph. Wind Advisories remain in effect for the aforementioned areas. For the Okanogan Valley, wind speeds will lessen slightly but will remain breezy out of the north with gusts of 25 to 30 mph through Friday. Precip chances linger over the eastern portion of the ID Panhandle Thursday before shifting into Montana. Limited precip chances pop up over the Cascade crest, Blues, and ID Panhandle mountains at times heading into the weekend and early next week, but otherwise, conditions are looking dry. Afternoon high temperatures stay consistent in the 50s and 60s through the weekend into early next week, but overnight lows will trend colder. Nighttime temperatures will fall below freezing across much of the region including the typically warmer L-C Valley Thursday night through Saturday night. Those with sensitive plants may want to take action to protect them from the cold. /Fewkes && .AVIATION... 00Z TAFS: Models show improvements with the cessation of precipitation. VFR conditions are generally favored for KEAT/KMWH. Drier air moves into Inland Northwest this evening with widespread VFR conditions favored tonight. Winds will remain breezy through Thursday. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence for conditions to improve towards VFR after precipitation ends. ----------------------- 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 38 56 35 53 32 55 / 20 30 10 10 0 0 Coeur d`Alene 36 53 32 52 30 54 / 40 60 30 10 0 0 Pullman 37 51 32 50 29 53 / 70 60 30 20 0 0 Lewiston 41 57 38 55 33 58 / 80 60 30 20 0 0 Colville 37 59 32 57 30 58 / 0 30 10 10 0 0 Sandpoint 35 49 32 49 30 50 / 50 70 40 20 0 10 Kellogg 37 49 31 48 28 51 / 90 80 50 30 0 10 Moses Lake 42 64 39 60 35 61 / 10 10 10 0 0 0 Wenatchee 45 64 42 59 39 59 / 0 10 10 0 0 0 Omak 41 61 37 57 34 60 / 10 0 0 0 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...Flood Watch until 11 PM PDT this evening for Washington Palouse. Wind Advisory until 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 until 11 PM PDT this evening for Central Panhandle Mountains-Idaho Palouse. && $$

673 FXUS66 KPDT 222249 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 349 PM PDT Wed Apr 22 2026 .KEY MESSAGES... - Light to moderate rainfall with breezy to locally windy conditions will continue through the late afternoon to evening hours across parts of the Columbia Basin and Blue Mountains. - Hydro concerns along the Naches and Umatilla Rivers. - A drier and warmer pattern is expected Thursday! && .DISCUSSION... Current radar shows a line of light to moderate rain continuing to fall in the Columbia Basin down through the Blue Mountains. The Kittitas and Yakima Valleys have dried out for the rest of night with the line advancing ahead, though windy conditions persist with 40-50 mph gusts prevailing across the Kittitas through the evening hours. Near the Northern Blue Mountains, strong orographic lift has enabled continuous moderate rainfall embedded with gusty 35-45 mph winds through the morning to afternoon hours. Observations from the past 12-hours shows that multiple sites already received 1 inch or greater of precip that include Meacham, Boiling Point, and Emigrant Springs. High confidence (>90% chance) that the Northern Blues will see at least an additional 1.7 to 2.7 inches of precip through tonight with the HREF 24-hour precip showing 1.3 to 1.5 inches in the 25th percentile. At the 75th percentile that jumps to 1.7 to 2.2 inches. Winds will continue to be breezy to locally windy across the OR Foothills, Kittitas Valley and Blues with winds decreasing below advisory level in the later evening hours (>90% confidence). Synoptically, a ridge protruding into the PacNW & British Columbia area in a sideways rex pattern will tapper down PoP`s through early next week. Model cluster support a cutoff low in the Alberta area will bring the area in-between the two systems with the ridge keeping most of the region dry while the low to the east will bring light snow showers into the Wallowa`s and parts of the Northern Blues. All of the LREF clusters tell a similar story through early next week with keeping the Columbia Basin dry with some light snow showers and rain across the mountainous regions (that includes Central Oregon). Not seeing anything in the way of any major impacts or highlights through early next week at this time with the ridge still present and preventing any major QPF systems to develop. && .AVIATION /00Z TAFS THROUGH 00Z FRIDAY/... Conditions range from VFR (most areas) to MVFR and even some IFR across the region as low pressure and rain impact the area. Latest radar imagery showed the back edge of the precipitation has made it through PSC and was working its way S and E. Conditions are expected to improve this evening. Winds will continue to gust, but will gradually lessen and most locations will be around 10 kts by morning, with DLS being the only exception. The other story is the gusty winds, mainly from the southwest to northwest across the TAF sites. These winds have beens as high as 40 to 45 kts across the region. Winds will remain gusty through the afternoon and evening hours before decreasing somewhat overnight. However, winds in the 15 to 25 kt range will be prevalent through the overnight hours. && .HYDROLOGY... Rainfall has been less than forecast but has still been substantial. Rain amounts have been up to 2 inches in the Blue Mountains and up to an inch in the Blue Mountain Foothills so far and another half inch to inch of rain is possible through this evening. This has caused streams and rivers to rise. The Umatilla River at Gibbon is forecast to approach moderate flood stage this afternoon, though with reduced rainfall amounts, confidence is low to medium (30%-40%) of approaching moderate flood stage. Confidence is 70% to 80% that the Umatilla at Gibbon will reach minor flood stage. The Umatilla River at Pendleton is forecasted to reach minor flood stage by a few inches briefly between 9 PM and 5 AM tonight. Confidence is only about 50% of this happening. The Grande Ronde River at Troy, the John Day River at Service Creek and the Walla Walla River at Touchet River are all expected to exceed bankfull tonight and tomorrow. The first two only exceed it by a few inches. The Walla Walla River at Touchet gets to within a half foot of minor flood stage, but with rainfall trending lower than anticipated, do not believe it will reach minor flood stage. Elsewhere, the forecast for the Naches River at Cliffdell has been lowered to just below action stage. The Naches River at Naches is forecast to get about a half foot above bankfull tomorrow morning but should not cause any significant flooding. 83 && .Preliminary Point Temps/PoPs... PDT 39 59 38 56 / 40 20 20 10 ALW 42 59 39 57 / 50 40 30 20 PSC 42 66 40 63 / 20 20 10 0 YKM 39 67 40 60 / 0 0 10 0 HRI 40 64 39 60 / 20 10 10 0 ELN 39 60 35 57 / 0 0 10 0 RDM 26 62 29 59 / 10 0 0 0 LGD 36 54 35 51 / 90 30 50 20 GCD 31 56 32 53 / 80 0 10 10 DLS 41 66 42 64 / 10 0 0 0 && .PDT WATCHES/WARNINGS/ADVISORIES... WA...Wind Advisory until 11 PM PDT this evening for WAZ024-026-029- 521. Flood Watch through Thursday evening for WAZ029. Winter Weather Advisory until 8 PM PDT this evening for WAZ030. 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...95 AVIATION...77 HYDROLOGY...83

858 FXUS65 KREV 222027 AFDREV Area Forecast Discussion National Weather Service Reno NV 127 PM PDT Wed Apr 22 2026 .KEY MESSAGES... * Storm exiting tonight with clearing skies. Light rain/snow or pellet showers possible through early evening. * Cold morning Thursday followed by seasonable temperatures Thursday and Friday afternoons and mostly dry conditions except a few showers over the mountains Friday. * Showers becoming more likely Saturday and Sunday, with potential for wetting rains and mountain snowfall. && .DISCUSSION... * Storm exiting the region with just residual light rain or snow showers through early evening. Weak instability could yield pellet showers - seeing a short anvil or two out the window here. Significant travel impacts are not expected. Skies will clear tonight, leading to widespread freezing temperatures with hard freezes likely (80% odds) in rural valleys of W Nevada. With recent moisture, areas of fog are likely (70% odds) in normally prone valleys like near Truckee and the Sierra Valley. * Temps warm back up to near or just above normal Thursday and Friday afternoons. A few showers could bubble up over the Sierra Friday afternoon with low-end instability present under weak troughing. * Saturday into Sunday is where things get a little more interesting with more appreciable troughing dropping into the region. Guidance shows increasing chances for showers and t-storms/pellet showers Saturday afternoon/night into Sunday. Highest chances over the mountains but if we end up with organized bands of showers, then wetting rains possible into W Nevada. This could also be a sneaky snowfall for areas above 6,500-7,000` which would impact travel over Sierra passes Sat night into Sunday morning when temps are coldest. Typically this time of year snowfall impacts are limited to the nighttime hours, unless snowfall rates are particularly high. * Cold and breezy day Sunday followed by gradually increasing temperatures as the week goes on next week. Guidance indicates continued risk for daily rain/snow showers at least into Monday and Tuesday, as the trough pattern over the west never totally fades away. I`d say overall forecast confidence for next week is below normal with multiple waves/troughs in the models. -Chris && .AVIATION... * Isolated MVFR rain/snow or pellet showers through early evening, mainly over the mountains near MMH/TVL/TRK (30-40% odds). A few in the vicinity of RNO/CXP/MEV too (10-20% odds). Gusty W/NW winds through early evening as well, with gusts 20-25 knots possible near showers. * Clearing skies tonight with winds subsiding. Fog likely Thursday morning (70% odds) at TRK and nearby valleys that had recent rain/snowfall. * VFR conditions Thursday with generally light N/NE winds. -Chris && .REV Watches/Warnings/Advisories... NV...None. CA...None. && $$

620 FXUS66 KSTO 222019 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 119 PM PDT Wed Apr 22 2026 For additional details on weather and expected impacts over the next 7 days, please visit weather.gov/sto/briefing. .KEY MESSAGES... - Lingering light rain showers, mountain snow, and isolated thunderstorms through this afternoon and early evening. - Warmer and drier conditions return on Thursday. - Light mountain showers and isolated thunderstorms Friday into early next week. Dry weather elsewhere. && .DISCUSSION... ...Today-Thursday... Afternoon radar imagery shows scattered light showers across the area as an upper low gradually moves into the Great Basin. Lingering light rain showers, mountain snow showers, and isolated thunderstorm chances (10-15%) are expected through this afternoon and early evening. Additional snowfall accumulations of up to 1 to 2 inches will be possible through this afternoon and early evening above 4500-5000 feet. Check road conditions before you go as roads will continue to be slick. Dry northwest flow develops tonight into Thursday, with drier and warmer conditions expected across the area. Forecast highs on Thursday will be in the 60s to mid 70s in the Valley and foothills, and in the 50s to 60s in the mountains. ...Friday - Early Next Week... Ensembles continue to show an upper low trough building over the EPAC that will move over the area this weekend as it merges with another trough. The troughing pattern will introduce chances for light mountain rain and snow showers Friday through early next week. Little to no impacts are expected as precipitation amounts are anticipated to remain light. NBM continues to depicts a 10-25% chance for afternoon mountain thunderstorms each day, with the highest chances on Saturday. Thunderstorms may also develop across portions of the northern Sacramento Valley and foothills on Saturday. Elsewhere, dry conditions are expected. Gradual warming continues into Friday, then gradual cooling is expected by the weekend. Highs will be in the 60s to 70s in the Valley and foothills this weekend, with cooler low to mid 40s to 50s for the higher elevations. && .AVIATION... A weather system continues to trend weaker with now MVFR to VFR conditions across northern CA from weak showers and cloud cover. Winds remain under 12 kts for the next 24 hours. Snow levels remain around 5000 to 6000 feet, increasing after 18z Thu. VFR conditions prevail across northern CA by 12z Thu. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$

442 FXUS65 KMSO 221925 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 125 PM MDT Wed Apr 22 2026 .DISCUSSION... KEY MESSAGES: - Widespread rain continues 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. - Cold overnight lows on Friday and Saturday mornings could impact sensitive vegetation. Satellite imagery and radar returns this afternoon indicate widespread rainfall moving south to north over the Northern Rockies, with the main low pressure circulation over southwest Montana and Lemhi County. The leading edge of the precipitation is providing the most intense rainfall rates. Some measuring sites in Clearwater County and west-central Montana already picked up about one-half inch of rain as of noon today. This system is also spawning isolated weak thunderstorms, which will continue throughout this afternoon and evening. Gusty west or southwest winds along a cold front associated with this system will also persist today. Widespread precipitation will continue into Friday as the Montana low moves east and another disturbance moves over the Northern Rockies from the north. Colder air associated with this system will bring snow levels down to mountain passes and some valleys. Expect wet, heavy snow over passes and higher valleys for Thursday morning. Motorists should expect winter driving conditions over Homestake, MacDonald, Lolo, Marias, and Lookout passes. Although confidence in mountain and mountain pass snow is high, there is still some uncertainty involving winter impacts in the valleys of western Montana. High resolution models are indicating a band of snow showers dropping north to south on Thursday morning. 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. Colder air from the northeast will help to enhance snow production on Friday morning. Regardless of precipitation amount and type, sub-freezing temperatures will be here for Friday and Saturday mornings, 20s in many locations (including Grangeville and Pierce Idaho). Some valleys (Butte, Stevensville, Seeley Lake, Ovando, Philipsburg,etc.) will get to the teens on Saturday morning. Cool, unsettled weather will stick around through the weekend and into next week while temperatures moderate back towards seasonable values. && .AVIATION...An upper level trough will track over south-central Montana by 0000Z(6 PM MDT), then into eastern Montana by 0600Z(12 AM Thursday). Wrap-around rain and snow will persist through Thursday morning by 1200Z(6 AM MDT). General IFR flying is expected with mountain obscuration from fog and low clouds. Breezy westerly winds are more likely at KSMN and KBTM at times through this evening. A cold front moving south out of Canada will bring snow to valley floors across northwest Montana between 1000Z(4 AM MDT) and 1700Z(11 AM MDT) Thursday. Brief periods of LIFR flying is possible under the stronger snow showers, possibly impacting KGPI. By Thursday afternoon, snow or graupel showers above 3000 feet along with lower visibility and ceiling are possible across western Montana and higher terrain of north-central Idaho. Additional snow showers are possible Thursday night which could impact all the terminals. && .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. && $$

252 FXUS65 KBOI 230011 AFDBOI Area Forecast Discussion National Weather Service Boise ID 611 PM MDT Wed Apr 22 2026 .UPDATE...Updated aviation discussion. && .KEY MESSAGES... - Cool, breezy and unsettled weather through Friday. Higher mountains will see an additional 4 to 8 inches of snow. - Frost or light freeze possible in agricultural valleys Friday and Saturday morning. - Remaining unsettled through the weekend and into early next week. Temperatures will gradually warm towards normal. && .SHORT TERM /Through Friday Night/... Issued 224 PM MDT WED APR 22 2026 The broad closed low over the Pac NW will lift northeast overnight, cutting off the steady precipitation that has helped break Boise`s April rainfall record. While this low exits the region, energy dropping out of Canada will keep a 40-70% chance of showers across the mtns in Baker County and w-central Idaho through Friday. Snow levels drop to around 4kft MSL tonight, allowing for up to an inch of accumulation in mountain valleys. Higher elevations will see an additional 3 to 8 inches of additional snow, with most of it falling by midday Thursday. Southeast Oregon and the Snake Plain in SW Idaho will trend drier Thursday and Friday as shower development remains to the north and east. Thursday and Friday stay breezy, aided by northwest flow on the backside of the upper trough. Each afternoon will bring gusts of 20 to 30 mph with windier spots along the I-84 corridor and through the Camas Prairie seeing gusts of 30 to 45 mph. Friday and Saturday morning will bring the chance of a frost or light freeze in the Snake Plain. Lows will generally range between 32-36 on Friday morning, shifting colder (30-35) for Saturday. && .LONG TERM /Saturday through Wednesday/... Issued 224 PM MDT WED APR 22 2026 A trough will extend into our region from a low center in central Canada through early next week. This will bring slightly below normal temperatures and precipitation chances (20-40%) to higher terrain through at least Monday. A push of moisture from an embedded shortwave to our south will bring elevated precipitation chances (40-60% chance) to the Nevada border through early next week. Accumulation looks to be minimal in any precipitation that forms. Snow levels will stay around 5000-6000 feet MSL through Tuesday, with higher elevations seeing light snow showers this weekend through Monday with lingering precipitation. A high pressure system will move into British Columbia by Tuesday, starting a steady warming trend through the region and bringing temperatures back to normals for this time of year. Disagreement on the evolution of a coastal low pressure system to our south muddles the precipitation forecast on Tuesday through Wednesday. Current precipitation chances range from 10-30% over higher terrain and near the Nevada border on Tuesday and Wednesday. && .AVIATION /00Z Thursday through Friday/... Issued 612 PM MDT WED APR 22 2026 Numerous showers continuing through this evening, tapering off after Thu/06z. Patchy fog/low stratus developing in sheltered mtn valleys early Thu/AM. Low VFR-MVFR in rain, IFR-LIFR in mtn snow/fog. Mtns obscured. Snow levels: 5-6.5 kft MSL this afternoon, lowering to 3.5-5kft MSL Thu/AM. Surface winds: SW-NW 10-20 kt with gusts to 20-30 kt this evening. Gusts decreasing overnight. Winds aloft at 10kft MSL: W-NW 20-40 kt. KBOI...VFR this evening. Steady rain showers returning around Thu/02z, with ceilings lowering to MVFR tonight. Rain ending and conditions improving to VFR after Thu/08z. Surface winds: W-NW 10-15 kt with gusts up to 20-25 kt this evening. Becoming W-NW 8-12 kt overnight. && .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 AVIATION.....NF SHORT TERM...DG LONG TERM....SA

384 FXUS65 KLKN 221850 AFDLKN Area Forecast Discussion National Weather Service Elko NV 1150 AM PDT Wed Apr 22 2026 .KEY MESSAGES... * Showers and isolated thunderstorms across most of northern Nevada this afternoon and into this evening * Warming trend Thursday and Friday * Next round of precipitation is expected this weekend with generally unsettled weather into next week && .DISCUSSION... (This afternoon through next Wednesday) WEATHER PATTERN OVERVIEW: Robust closed upper low has effectively weakened into an open wave with the trof axis residing over the PacNW and Nevada. Unsettled weather will be in place thru the rest of this afternoon as light showers move from west to east across northern Nevada with central Nevada remaining mostly dry. There will also be a low chance for weak, low topped, thunderstorms this afternoon with just enough instability present under the cooler air mass. The typical hazards of occasional lightning and strong and erratic outflow gusts of 45 mph can be expected under any such storms along with graupel. Any thunderstorms that do form will be primarily situated across northern Elko County. Not expecting any significant additional precipitation accumulation today across the area with showers and thunderstorms this afternoon and evening. However the Jarbidge Wilderness and Independence Range will likely see an additional 2-3 inches of snow accumulation. Westerly breezes will ease thru the afternoon and evening. Overnight low temperatures tonight will be in the 20s with mid to upper teens in the typical colder valleys. Fairer weather Thursday and Friday under northwesterly flow as the afore mentioned upper level trof intensifies into a deep closed low over the Prairie Provinces while high pressure resides off the west coast. West-northwesterly breezes will be present each afternoon. Temperatures also warm each day, with daytime highs mostly in the 60s by Friday afternoon. Next bout of active weather and precipitation moves in Saturday from the west, bringing valley rain and mountain snow to the forecast area. Breezes will also be present. Anticipating weather to remain generally unsettled into early next week with light showers each day Monday thru Tuesday. FORECAST CONFIDENCE & DEVIATIONS: High forecast confidence thru Friday, becoming moderate this weekend, primarily with regard to precipitation accumulation including high elevation snow. Otherwise timing looks to be relatively on track. Significant change to PoPs within the short term of the most recent forecast, utilizing a blend of WPC guidance and various high-res and global numerical models. NBM PoPs much too bullish in the short term. Otherwise little to no change elsewhere in the gridded forecast. && .AVIATION...VFR condtions look to prevail thru tomorrow afternoon, though VCSH is forecast at all terminals this afternoon aside for KTPH. Locally lower CIGs can be expected under any showers that move in vicinity or on terminal, which may intermittently reduce flight condtions to MVFR. Low and mid level clouds across the forecast area this afternoon will also cause concern for mountain obscuration. Low probability of TS this afternoon as well, primarily at KEKO and KENV. Not enough confidence however to include TS or VCTS in the TAF. Otherwise westerly breezes will continue thru this afternoon with gusts 20-25KT at all terminals, though the trend will be for decreasing wind speeds thru the afternoon and evening. Generally lighter winds on Thursday under mostly clear skies. && .LKN Watches/Warnings/Advisories... None. && $$ DISCUSSION...92 AVIATION...92