399 FXUS66 KSEW 241014 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 314 AM PDT Fri Apr 24 2026 .SYNOPSIS... Upper level ridge offshore extending into Northern British Columbia combined with an upper level low over the Canadian Prairies giving Western Washington dry northerly flow aloft through the weekend. The low will move east Monday with the upper level ridge moving over the area in the middle of next week. && .SHORT TERM /TODAY THROUGH SUNDAY/... Satellite imagery shows some stubborn stratus over Pierce county and in the Skagit River Valley early this morning. Patchy fog over the Southwest Interior with local visibilities a half mile or less. Mostly clear skies over the remainder of the area. Cooler locations at 3 am/10z were in the upper 30s. Most of the area was in the lower to mid 40s. Upper level ridge offshore extending into Northern British Columbia combining with an upper level low well to the east giving Western Washington dry northerly flow aloft today. Stubborn stratus along the the patchy fog will dissipate later today leaving mostly sunny skies. Highs in the upper 50s to mid 60s. Cool night tonight with clear skies and light flow in the lower levels. Have issued a frost advisory for portions of the Southwest Interior and Sound Puget Sound for low temperatures near freezing Saturday morning. Elsewhere lows in the mid to upper 30s. LIttle change in the pattern over the weekend with dry northerly flow aloft continuing over the area. Slight chance Sunday that weak instablilty over the Cascades late in the day could trigger a shower. Highs in the 60s. Lows in the mid 30s to lower 40s. Felton && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... Models in good agreement that a weak shortwave rotating around the upper level low will increase the cloud cover Monday as well as the chances for showers over the Cascades. With the flow aloft north northeasterly showers could float down into the Cascade foothills. Upper level low moving east Tuesday and Wednesday with the upper level ridge offshore drifting over Western Washington in the middle of next week. Highs in the lower to mid 60s Monday and Tuesday warming to the 60s and lower 70s Wednesday and Thursday. Lows in the upper 30s to mid 40s. Seattle April rainfall through the 23rd is 2.73 inches. Current forecast is dry for the rest of the month. The normal monthly April rainfall for Seattle is 3.18 inches. If the forecast holds and April ends up below normal that will make 30 out of the last 40 months ( since the start of 2023 ) Seattle will have below normal monthly rainfall. Felton && .AVIATION... Dry, northerly flow over western WA today with a ridge offshore and a low/trough to our east. VFR conditions prevail through the TAF period with mostly clear skies. More sheltered locations and the river valleys (including PWT and OLM) may develop some patchy shallow fog early this morning, but should remain localized and burn off quickly after sunrise. Light and variable winds this morning will increase to N/NE 8-15 kt. A few gusts to 20 kt will be possible this afternoon. KSEA...VFR conditions prevail through the periods with mostly clear skies. Light and variable winds will become N/NE 8 to 12 kt. Gusts to 15-20 kt will be possible this afternoon btwn 21-03Z. && .MARINE... The overall pattern remains fairly consistent through the next 7 days with higher pressure well offshore and lower pressure inland, for mostly northerly winds over the coastal waters. Easterly winds through the Strait will continue through Saturday, with onshore flow resuming Sunday into next week. Seas will remain in the 4 to 8 ft range. Northerly winds through the East Strait down through Admiralty Inlet and Puget Sound will be breezy this afternoon and evening, with winds reaching 15 to 20 kt. 62 && .HYDROLOGY... No river flooding in the next 7 days. && .SEW WATCHES/WARNINGS/ADVISORIES... WA...Frost Advisory from 11 PM this evening to 10 AM PDT Saturday for Lowlands of Lewis and Southern Thurston Counties- Lowlands of Pierce and Southern King Counties-Olympia and Southern Puget Sound-Southern Hood Canal. PZ...None. && $$

675 FXUS66 KPQR 241101 AFDPQR Area Forecast Discussion National Weather Service Portland OR 401 AM PDT Fri Apr 24 2026 .SYNOPSIS...Dry conditions with mostly sunny skies through Saturday. Potential for frost tonight across the Upper Hood River Valley and southern Willamette Valley. High temperatures remain near or slightly above seasonable normals for late April. Chances for light, non-impactful showers increase Sunday to Tuesday, with the highest chances over the Cascades. Drier and potentially warmer temperatures return by Wednesday to Thursday as high pressure re-builds. && .DISCUSSION...Today through Thursday...Satellite imagery as of early Friday morning depicts mostly clear skies with a few low clouds across northwest Oregon and southwest Washington. Given the clear skies and light winds, there should be some decent radiation cooling early this morning. However, the vast majority of the area will remain warm enough to prevent frost development. An exception is the Upper Hood River Valley, where temperatures have fallen to around 33-35 degrees for locations above 1000 feet (south of Odell). Closer to river level, temperatures are relatively warmer in the mid to upper 30s, but can`t rule out some patchy frost. A Frost Advisory has been issued for the Upper Hood River Valley through 10 AM this morning. Meanwhile, along the I-5 corridor, the highest threat for frost will be across the southern Willamette Valley, with chances for temperatures dropping below 36 degrees in this area being around 15-25% this morning. Expect dry weather with mostly sunny skies across northwest Oregon and southwest Washington today and Saturday. The upper level pattern over the Pacific Northwest remains northerly to northwesterly, mainly due to an amplified ridge over far northwest Canada and the northeast Pacific, and a stalled closed low over south-central Canada and the northern Plains. Since we`re in a drier airmass and far removed from the low, conditions remain dry through Saturday. Temperatures are forecast near to slightly above normal this weekend, with highs in the mid to upper 60s for interior lowland valleys, and upper 50s to low 60s along the immediate coast. Since skies will remain clear Friday night, there will be renewed chances for frost development across interior valleys heading into Saturday morning. Chances for temperatures falling below 36 degrees are higher Friday night: 30-40% for the southern Willamette Valley, and 50-80% across the Upper Hood River Valley with the highest chances above 1000 feet elevation. Will need to potentially consider another Frost Advisory for the Upper Hood River Valley for tonight. Yesterday`s cloud cover resulted in uncertainty for frost in the Upper Hood River Valley this morning, but there is higher confidence that conditions will be clear going into tonight. Sunday through Tuesday, additional weak shortwave troughs extending from the parent low over south-central Canada will swing through the Pacific Northwest and bring increased chances for light, non-impactful showers. Chances for showers peak around 10-20% along the I-5 corridor and 20-40% across the Cascades, with the highest chances on Monday. Temperatures remain seasonable and in the mid to upper 60s for interior valleys early next week, but could be a few degrees cooler on Monday due to potential showers. Wednesday to Thursday, the majority of LREF ensemble members suggest that upper level ridging will build over the northeast Pacific and shift into the Pacific Northwest. Most ensemble members also show above-average 500 mb heights over the area, suggesting warmer temperatures by mid to late next week. There still remains some uncertainty on the exact strength and placement of the ridge axis, thus leading to a wide range of high temperatures: high end max temperatures for Thursday next week are currently in the upper 70s to low 80s, while low end max temperatures are in the low to mid 60s. -10 && .AVIATION...VFR conditions for all terminals through the TAF period with mostly clear skies. Temperatures dropping to the mid 30s across the Upper Hood River Valley will result in potential frost development over metal surfaces through 16z Fri. High pressure today will result in northerly winds across the area, breeziest between 18z Fri-02z Sat. During this time, tightening pressure gradients will result in northerly wind gusts up to 20-25 kt, strongest from KUAO/KTMK southward. Meanwhile, an offshore pressure gradient will develop between KTTD-KDLS, resulting in easterly winds through the Columbia River Gorge and gusts up to 20 kt in the far eastern Portland/Vancouver Metro including KTTD. KPDX AND APPROACHES...VFR conditions through the TAF period. Light and variable winds through 15z Fri. Winds turn more northeasterly and increase near 10 kt after 16-18z Fri. Low confidence for persistent wind gusts greater than 20 kt. The strongest wind gusts (20-25 kt) will be near the mouth of the Columbia River Gorge. -10 && .MARINE...High pressure over the waters and a thermal trough along the coast will result in north-northeasterly winds across the waters today. Pressure gradients will tighten tonight into early Saturday morning, resulting in breezy northerly winds with gusts up to 25 kt. The strongest winds will be south of Cape Falcon, so Small Craft Advisories have been issued for these central and southern marine zones through 2 AM Saturday. Pressure gradients gradually ease throughout Saturday morning, weakening northerly winds. Seas remain around 6-8 ft at 9-10 sec today, building to 8-9 ft tonight south of Cape Falcon as wind waves increase. High pressure continues late this weekend into early next week, with winds turning more west-northwesterly and remaining under 15 kt. A northwesterly swell also persists through next week, with seas falling to 5-6 ft by Monday to Tuesday. -10 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...Frost Advisory until 10 AM PDT this morning for ORZ121. WA...None. PZ...Small Craft Advisory from 3 PM this afternoon to 2 AM PDT Saturday for PZZ252-253-272-273. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland

008 FXUS66 KMFR 241152 AFDMFR Area Forecast Discussion National Weather Service Medford OR 452 AM PDT Fri Apr 24 2026 ...Updated AVIATION section for 12Z TAFs... .DISCUSSION...This forecast period is largely defined by the presence and location of an omega block pattern, with an upper ridge currently over the Pacific pinned between two low pressure systems, one west of Alaska and the other over central Canada and the northern United States. Currently, northwest flow aloft is allowing for generally seasonable conditions across the area. Areas of localized frosty temperatures and patchy fog are possible in west side valleys, but these are not expected to become widespread. West side valleys will see a few degrees of warming from Thursday`s daytime highs, bringing low to mid 70s for most of these lower elevation areas. Coastal areas will also see warming, with high temperatures expected to reach the mid 60s. Areas east of the Cascades stay cooler, with temperatures in the high 50s to mid 60s. Unsettled air looks to swing around the continental low pressure system and move over the area through Saturday and Sunday. This looks to bring a few degrees of cooling during the day, with the possibility of localized frost conditions for some west side valleys again. While this disturbance won`t bring widespread rainfall, the instability is supporting thunderstorm chances on both Saturday and Sunday afternoon. For Saturday, these chances are slight (10-20%) and limited to southeastern Siskiyou and southern Modoc counties. These areas may see isolated showers Saturday night into Sunday morning. There`s some disagreement for activity on Sunday, with GFS outcomes showing CAPE values of 300-500 J/kg over Douglas County and 100-300 J/kg over most other areas, which could bring isolated to scattered thunderstorms over a wider area. ECMWF modeling keeps activity generally to Siskiyou and Modoc counties. Conversely, ECMWF imagery shows some light showers across the area on Monday while GFS modeling shows the instability dissipating, keeping the area dry. Severe activity is not expected. The upper pattern shifts eastward through next week, with the upper ridge passing to the north and a cutoff low passing to the south. With the flow splitting around the area, a period of more stable weather is possible. Meager precipitation chances linger over the Cascades and Lake County on Tuesday, with the rest of the week looking dry across the area. Temperatures warm into midweek, and may remain warm into the end of the week. Lomg-term meteograms hint at some form of activity in early May, but agreement on timing and quantity is sparse. -TAD && .AVIATION...24/12Z TAFs...With stable weather expected through the TAF period, VFR levels with clear skies and normal diurnal winds are expected for most area in northern California and southern Oregon this TAF period. The only note is for a period of gusty winds expected at the North Bend terminal this afternoon. These winds should ease this evening. -TAD && .MARINE...Updated 300 AM PDT Friday, April 24, 2026...Gusty northerly winds continue to build steep seas in all area waters today, with the strongest winds south of Cape Blanco. Winds and seas look to reach below advisory level late Saturday morning. Slight chances of marine showers are present Sunday. No significant weather is expected early next week. Northerly winds will persist while a low northwest swell combines with a fresh, shorter period NNW swell. Steep seas could return around mid-week when there could be an uptick in northerly winds and an increasing northwest swell moves into the waters. && .MFR WATCHES/WARNINGS/ADVISORIES... OR...CA...None. PACIFIC COASTAL WATERS...Small Craft Advisory until 5 AM PDT Saturday for PZZ350-356-370-376. && $$

826 FXUS66 KEKA 240708 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 1208 AM PDT Fri Apr 24 2026 .SYNOPSIS...Isolated showers and thunderstorms are possible in the interior this afternoon. There are additional shower chances each afternoon through Monday. Drier weather returns mid next week. && .DISCUSSION...High pressure weakens today as multiple upper lows and trough digging into the northern Rockies interact with each other. Cooler temperatures aloft will support instability over the interior this afternoon. The main uncertainty is if there will be enough moisture to support thunderstorm development, but CAMs are showing a few showers developing over eastern Trinity and the Yolla Bolly`s. Saturday, the trough over the Rockies continues to dig westward while a secondary upper low approaches the southern California coast. This pattern looks like it will bring slightly more moisture which could support more shower and thunderstorm development over the interior. The highest chances in northern Lake, eastern Mendocino, and eastern Trinity. The chance for wetting rain (>0.1") is around 20-40% over much of Trinity and eastern Mendocino, with much lower probabilities elsewhere. Additional chances for showers and isolated interior thunderstorms are possible Sunday and Monday afternoons, depending on the positioning of the low. All told, the chance for wetting rain over a 72 hour period from Saturday morning to Tuesday morning is only around 40% for much of Trinity, and 20% outside of Trinity County. At the coast, any precipitation would likely be in the form of drizzle or a stray light shower. Drier and warmer weather is likely to return by mid next week as ridging redevelops. JB && .AVIATION...VFR conditions have prevailed through Thursday evening. In contrast to previous nights, however, a robust marine layer is evident on satellite even before midnight. Models suggest MVFR to IFR ceilings will likely (65% chance) at least briefly form along the coast Friday morning, with the greatest chances around Humboldt Bay. Chances are even greater (80% chance) Friday night into Saturday of MVFR ceilings forming even before midnight Friday night. Otherwise, modest north winds during the afternoon will be the only notable feature during the day Friday. /JHW && .MARINE...Northerly winds peaked Thursday evening with some gusts in the southern waters recorded in excess of 25 kts. Steep short period seas have built near 10 feet in response. Heading into Friday, moderate to strong northerly winds will gradually shunt further offshore. While some short period wave energy will linger closer to shore, it to will push offshore by the evening with seas near shore falling below 6 feet. WInds will generally weaken this weekend. Winds will remain gentle for the inner waters, but gusts up to 25 kts will ebb and flow through the outer waters. Seas will be mostly controlled by short period seas, though a mid period westerly swell up to 4 feet will modify the sea state through the weekend. More widespread, calmer conditions are expected for all waters early next week. /JHW && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 6 AM PDT early this morning for PZZ455. Small Craft Advisory until noon PDT today for PZZ470. Small Craft Advisory until 3 PM PDT this afternoon 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

396 FXUS66 KMTR 241150 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 450 AM PDT Fri Apr 24 2026 ...New AVIATION, MARINE... .KEY MESSAGES... Updated at 1205 AM PDT Fri Apr 24 2026 - Low potential for drizzle this morning across the Central Coast - Additional rounds of drizzle/light rain likely Saturday and Sunday - Below normal temperatures this weekend before a warming trend kicks off early next week && .SHORT TERM... Issued at 1205 AM PDT Fri Apr 24 2026 (Today and tonight) High clouds are streaming in with some lower level stratus making its way along the coast. There is some potential for fog tonight across the North Bay Valleys but confidence is mixed given the high level clouds moving in. Any fog that does develop should be relatively patchy due to the high level clouds minimizing how much radiational cooling is able to occur. If you do encounter fog on your morning commute remember to slow down, turn on your low beam headlights, and allow extra time to reach your destination. Broad upper level troughing persists across California as a deep upper level low remains fairly stationary over Canada/Montana/North Dakota. Within this broader trough, a weak upper level low looks to develop offshore of the Bay Area and move inland throughout the day. In terms of our rain chances, the current forecast grids show a less than 10% chance of precipitation today, but, some CAMs are showing isolated showers developing across the region Friday morning. The question then becomes how much moisture will actually be available today. The GFS shows a brief uptick in PWAT values from around 0.45" up to 0.55-0.65" Friday morning. The timing of this slight moisture flux matches well with when models like the NAM show some scattered showers over the Santa Lucia Range and the potential for drizzle across the rest of the Central Coast. Drier conditions are expected across the rest of the Bay Area so not anticipating drizzle to extend beyond coastal areas. If any rain is able to develop it is still unlikely for accumulations to be greater than a few hundredths to (maybe) a tenth of an inch across the Santa Lucia Range. Heading into the afternoon, we may start to see more radar returns across the marine environment but at this time we are not anticipating these showers moving inland or any accumulation from them. High temperatures on Friday will cool by around 4-5 degrees with highs dropping into the mid to upper 60s across the interior, 50s to 60s along the coast, and mid to upper 70s across the interior Central Coast. Diurnally breezy onshore winds continue with windiest conditions expected across the Salinas Valley and Altamont Pass region. && .LONG TERM... Issued at 1205 AM PDT Fri Apr 24 2026 (Saturday through Thursday) Heading into Saturday, we see slightly higher chances for precipitation as the upper level trough over California becomes more well defined and a second weak upper level low pushes into Southern California. This system will be accompanied by a stronger PWAT plume but the bulk of this moisture is aimed to our south. Model guidance does show several pulses of moisture moving through our CWA Saturday and Sunday which may support additional rounds of drizzle to light rain this weekend. Widespread drizzle is the most likely outcome with light rain possible in the Santa Lucia Range thanks to orographic uplift. Similar to Friday, precipitation totals will be minimal, ranging from a trace to a few hundredths of an inch. Portions of the higher terrain could see up to a tenth of an inch of rain between Saturday and Sunday. No major wind concerns with this system but locally gustier winds between 25 to 35 mph are expected across the higher elevations on Saturday. Broad upper level troughing continues through the remainder of the long term before upper level ridging looks to briefly rebuild Friday into early next weekend. Temperatures remain below normal this weekend with highs in the upper 50s to 60s. This is short lived with a slight warming trend kicking off Monday. Interior high temperatures will warm into the upper 60s to low 70s on Monday before warming into the low to mid 70s Tuesday through Thursday. Coastal high temperatures will remain relatively stable in the 50s to 60s through late next week. In the long run, CPC guidance shows a return leaning above normal temperatures and leaning above normal precipitation for the end of April into the beginning of May. Ensemble guidance has been showing the potential for another round of light, beneficial rain in this timeframe. This will be something to keep an eye on as we exit our rainy season and head into summer. && .AVIATION... (12Z TAFS) Issued at 441 AM PDT Fri Apr 24 2026 A mix of MVFR/VFR cigs early this morning with all terminals expected to be VFR by late morning, and should persist into the evening hours. By later this evening a steadier fetch of onshore flow will replace relatively light mixed surface flow along the coastline. Expect more widespread MVFR cigs from late tonight through Saturday morning. Vicinity of SFO...A mix of MVFR/VFR cigs with steadier but relatively light onshore flow developing. Moderate confidence in MVFR cig heights with guidance indicating a low chance for IFR cigs through the TAF period. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...MVFR cigs will give way to VFR by late morning/early afternoon when breezy onshore flow develops for the afternoon and early evening. Expect MVFR cigs for KMRY later this evening, with lower confidence that the relatively weak onshore flow will penetrate into the Salinas Valley. && .MARINE... (Today through Wednesday) Issued at 441 AM PDT Fri Apr 24 2026 Choppy seas will begin to gradually subside today and continue to do so into the weekend. There is a chance for light rain this morning over the southern outer waters, along with drizzle and light rain along the coast this weekend. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...None. && $$ SHORT TERM...Kennedy LONG TERM....Kennedy AVIATION...JM MARINE...JM 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

240 FXUS66 KOTX 241116 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 416 AM PDT Fri Apr 24 2026 .KEY MESSAGES... - Gusty north winds continue down the Okanogan Valley through Friday. - Chilly overnight temperatures with sensitive vegetation susceptible to frost and freeze damage through Saturday morning. && .SYNOPSIS... Aside from mountain showers, dry conditions and partly cloudy skies will prevail Friday through the weekend. Overnight lows will trend colder with temperatures dropping below freezing through Saturday night for much of the region. Temperatures start to slowly moderate into next week. A passing weather system early next week will bring a better chance for scattered showers across much of the region Monday into Tuesday. && Today through Sunday night: The Inland Northwest will be on the back edge of a broad upper level trough of lower pressure. This will bring a northerly flow pattern and abnormally dry air has infiltrated the region behind yesterday`s shortwave passage. The lack of moisture and absence of additional shortwave energy over the next few days will limit shower activity. Diurnal heating will bring a 10-30% chance for showers over the Idaho Panhandle over the weekend. Today will be too dry though for an more than an isolated shower in the southern portion of the Idaho Panhandle. Dew points tonight range from the single digits and teens over the east slopes of the northern Cascades to the Okanogan Highlands and are dropping into the lower to mid 20s into the Idaho Panhandle behind the passing shortwave. We will continue with this drying trend into Friday. Winds will continue to be gusty down the Okanogan Valley with gusts between 20-30 mph. Higher gusts are expected in the morning as the inversion lifts and then will relax a bit in the afternoon as diurnal heating in the Columbia Basin counteracts the northerly pressure gradient. Winds will weaken further into Friday night, and this will set up the potential for strong radiational cooling across the region with cloud cover limited. Many areas will see temperatures cool to below the freezing mark. This includes the Moses Lake Area and Lewiston-Clarkston Valley that are within their growing season. A Freeze Watch has been issued for the potential of freezing temperatures for these areas Friday night into Saturday morning. The Lewiston-Clarkston Valley will see the potential for frost this morning with a Frost Advisory remaining in effect until 9AM. Monday through Tuesday: There is good agreement amongst the model guidance for a shortwave disturbance to push across out of British Columbia. There is uncertainty with timing and strength of this disturbance. There isn`t a scenario that shows anything particularly strong. Most likely scenario is for more widely scattered showers to develop across the Inland Northwest for Monday afternoon. There is weak CAPE across the eastern half of the forecast area of up to 200-400 J/kg. The CAPE is pretty shallow with equilibrium levels having a hard time pushing past 16 kft agl. This will be difficult to generate enough charge separation for lightning. Cannot rule out a stray lightning strike from a thunderstorm, but most likely looking a showers. Gusty outflow winds will be the main hazard from showers, but nothing too concerning with peak gusts generally up to around 30 mph possible. Convective showers will linger into Tuesday over the Idaho Panhandle with diurnal heating. Tuesday night through Friday: Model ensembles show the pattern shifting to more of a ridge and higher heights for the latter half of the work week. This will result in a warming and drying trend with highs warming into the upper 60s and 70s. This will bring us back above average for our temperatures for late April. We will see high elevation snow melt taking place result in modest rises of some mainstem rivers. Most notable will be the Stehekin River that is expected to see an additional rise next week. /SVH && .AVIATION... 12Z TAFS: VFR conditions are expected through the day. Winds will generally be light, expect for the Okanogan Valley where gusts of 20-30 kts are expected at KOMK Friday morning. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: There is high confidence for VFR conditions. ----------------------- 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 54 30 56 34 58 36 / 0 0 0 0 10 10 Coeur d`Alene 53 29 55 34 55 33 / 0 0 10 0 20 10 Pullman 50 28 53 32 55 34 / 0 0 10 0 20 10 Lewiston 56 33 58 37 59 38 / 0 0 0 0 10 0 Colville 58 25 59 32 60 32 / 0 0 10 10 20 10 Sandpoint 51 31 52 33 52 32 / 10 10 20 20 30 10 Kellogg 49 29 52 32 53 33 / 10 10 20 10 30 10 Moses Lake 60 31 62 36 64 38 / 0 0 0 0 0 10 Wenatchee 59 37 61 41 63 43 / 0 0 0 0 10 10 Omak 60 32 62 36 63 38 / 0 0 0 0 10 10 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...Frost Advisory until 9 AM PDT this morning for Lower Garfield and Asotin Counties. Freeze Watch from late tonight through Saturday morning for Lower Garfield and Asotin Counties-Moses Lake Area. ID...Frost Advisory until 9 AM PDT this morning for Lewiston Area. Freeze Watch from late tonight through Saturday morning for Lewiston Area. && $$

471 FXUS66 KPDT 241033 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 333 AM PDT Fri Apr 24 2026 .KEY MESSAGES... 1. Drier and cooler temperatures through the weekend 2. Freeze Warning for Saturday morning 3. Mountain precipitation returns Sunday && .DISCUSSION... Current radar shows the returns to have moved out pf the region and to the southeast. Ground observations show trace amounts of rainfall occurred since 5 PM. No more precipitation is expected through the the weekend until the next system moves across the region beginning Sunday. Models are in form agreement with the upper level flow for the northwest. This pattern is brining in drier and cooler air which is leading to below average seasonal temperatures through the weekend. In house seasonal calculations show that Friday and Saturday high temperatures will be between 5 to 10 degrees below seasonal normal with some isolated 15 degrees below normal along the ridgelines. Temperatures over the weekend are expected to be in the mid 50s with some isolated locations in the Basin seeing low 60s with 70-90% of the NBM raw ensembles in agreement. Models show the region to be influenced by colder air, coupled with dry air and clear skies, temperatures are expected to dip into very cold temperatures across the region. So much so that a freeze warning has been issued for the Kittitas Valley, lower Columbia Basin and the foothills of the northern Blue Mountains of OR and WA. Guidance shows temperatures through the aforementioned areas to be at or below freezing Saturday morning. 70-90% of the NBM raw ensembles are in agreement with these cold temperatures. In house seasonal comparisons show these areas to be 10-15 degrees below seasonal average. Models show a shift in the pattern as an upper level low coming out of B.C. clips the region. This will bring chances of mountain precipitation Sunday with very little accumulations. By Monday, precipitation amounts will be more prevalent, especially across the eastern mountains and OR Cascades Sunday with rain amounts between 0.01-0.02 along the foothills and 0.04-0.07 along the crests with 50- 70% probabilities. Very light mountain showers will persist through Tuesday before dry and warmer temperatures make it way back into the region under an incoming upper level ridge. 90 && .AVIATION /06Z TAFS THROUGH 06Z SATURDAY/... VFR conditions will persist through the forecast period. Cigs will be 25kft to SKC through the period with winds below 12 kts. 90 && .Preliminary Point Temps/PoPs... PDT 55 31 59 34 / 0 0 0 0 ALW 57 35 60 38 / 0 0 10 0 PSC 61 31 64 35 / 0 0 0 0 YKM 61 34 63 36 / 0 0 0 0 HRI 60 31 63 34 / 0 0 0 0 ELN 56 31 58 34 / 0 0 0 0 RDM 57 24 57 27 / 0 0 0 0 LGD 51 28 55 31 / 10 0 10 0 GCD 52 28 55 30 / 0 0 10 10 DLS 63 37 66 39 / 0 0 0 0 && .PDT WATCHES/WARNINGS/ADVISORIES... WA...Freeze Warning from midnight tonight to 8 AM PDT Saturday for WAZ026-028-029. OR...Freeze Warning from midnight tonight to 8 AM PDT Saturday for ORZ044-507. && $$ DISCUSSION...90 AVIATION...90

861 FXUS65 KREV 240941 AFDREV Area Forecast Discussion National Weather Service Reno NV 241 AM PDT Fri Apr 24 2026 .KEY MESSAGES... * Shower and thunderstorm chances increase today across the Sierra and Sierra Front. * Showers and thunderstorms continue this weekend with more persistent mountain snow for the Tahoe area and eastern Sierra Saturday night into Sunday. * Showery weather is favored to continue into next week with drier conditions possible late next week. && .DISCUSSION... A persistent western troughing pattern will deliver several days of showery weather beginning today and lasting into next week. Differential surface heating along the higher Sierra terrain should yield enough instability for shower and isolated thunderstorm development (15-30% chance) this afternoon across the eastern Sierra and Sierra Front. Impacts should be minimal, but be cautious of wet/slick roads in the mountains. There is better potential for steady, more widespread rain and mountain snow Saturday into Sunday as two distinct areas of low pressure approach the region. The positioning of these lows favor Lassen and Washoe counties, and the Sierra south of US-50 for best shower chances of 40-80% with less than 30% elsewhere. Snow impacts may arise in Alpine and Mono County late Saturday into Sunday morning when there is a 30-60% chance of 1" of snow for communities along US-395 with similar odds of 6" or more along mountain ridges. Additional thunderstorms are also on the table Saturday afternoon, especially across Lassen and N Washoe counties (15-20% odds). Sunday into next week offers additional shower and thunderstorm chances with minimal change to our governing weather pattern. Drier conditions may return towards the end of next week as guidance suggests high pressure developing across the western states. -Salas && .AVIATION... Widespread VFR conditions -- except KTRK where periods of FZFG/IFR continue through mid-morning -- prevail through the morning before rain and mountain snow showers with isolated lightning develop in the afternoon. KTRK and KTVL are most likely (10-30% chance) to be impacted with briefly reduced CIGS/VIS, mountain obscuration, and isolated lightning accompanying stronger showers and thunderstorms. Shower odds and coverage both increase on Saturday, expanding degraded flight conditions into western Nevada. -Salas && .REV Watches/Warnings/Advisories... NV...None. CA...None. && $$

229 FXUS66 KSTO 232146 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 246 PM PDT Thu Apr 23 2026 .KEY MESSAGES... - Light mountain showers and isolated thunderstorms Friday afternoon into early next week. - Shower and isolated thunderstorm potential spreads into the foothills and into the northern Sacramento Valley for the weekend, highest on Sunday. - Light showers over the Sierra early to mid-week, south of Interstate 80. - Temperatures trend cool for weekend, a little above normal mid to late next week. && .DISCUSSION... ...Today... Sunny, dry and warmer today. Forecast highs late this afternoon will be in the 60s to mid 70s in the Valley and foothills, and in the 50s to 60s in the mountains. ...Friday - Mid Next Week... Ensembles continue to show an upper low trough building over the eastern Pacific that will move over the area this weekend as it merges with another trough. This pattern will introduce chances for light mountain rain and snow showers starting Friday afternoon, with a 10-15% chance for isolated thunderstorms over the Sierra crest. There is a better (15-25% chance) for afternoon/evening mountain thunderstorms over the weekend, highest on Sunday, with some thunderstorm potential into the foothills and northern Sacramento Valley. Little to no impacts are expected as precipitation amounts are generally anticipated to remain relatively light. Showers and isolated thunderstorms are expected to be limited mainly to the mountains Monday. Snow amounts Friday into early next week are expected to be generally light, a dusting to a few inches. Lingering showers continue over the Sierra south of Interstate 80 Tuesday into Wednesday. Gradual cooling is expected into 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. Temperatures trend higher mid to late week, with 70s to around 80 in the Valley. elevations && .AVIATION... VFR conditions with mostly clear skies are expected across northern CA through 18Z Friday. Surface winds remain under 12 kts for the next 24 hours. Mountain showers possible after 18Z Friday, including slight chance of isolated thunderstorms over the Sierra Crest. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$

040 FXUS65 KMSO 240815 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 215 AM MDT Fri Apr 24 2026 .DISCUSSION... KEY MESSAGES: - Near record or record cold temperatures forecast for Saturday morning. - Cold lasts into early next week. Showers at 1am are consolidating over the Northern Bitterroot Valley. Combine that with breezy conditions and a few icy spots could be possible in the south hills of Missoula and northern Bitteroot Valley this morning commute. Afternoon showers are expected today as the region remains under cold, cyclonic flow. These showers will be capable of rapidly reducing visibility. Attention shifts to unseasonably cold mornings as a persistent cyclonic flow remains over the Northern Rockies. With temperatures approaching record lows through mid-week, expect a significant diurnal swing; kids will need jackets in the mornings while carrying them home during the afternoons. Additionally, remember to protect any sensitive plants overnight until temperatures start to moderate mid-week. This flow will also allow a few disturbances to cycle through the region during this period. && .AVIATION...Showers will continue mainly I-90 and south through the morning and reinitiate region wide this afternoon under northwest flow. With temperatures at or just below freezing, precipitation will be frozen overnight and mixed with rain during afternoons. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...Winter Weather Advisory until noon MDT today for Bitterroot/Sapphire Mountains...Butte/Blackfoot Region... Potomac/Seeley Lake Region. Winter Weather Advisory until 11 AM MDT this morning for Lower Clark Fork Region...Missoula/Bitterroot Valleys. ID...Winter Weather Advisory until noon MDT /11 AM PDT/ today for Eastern Lemhi County...Southern Clearwater Mountains... Western Lemhi County. && $$

832 FXUS65 KBOI 241154 AFDBOI Area Forecast Discussion National Weather Service Boise ID 554 AM MDT Fri Apr 24 2026 .UPDATE...Updated aviation discussion. && .KEY MESSAGES... - Light mountain snow showers and breezy winds today. - Widespread frost and areas of freezing temperatures late tonight into Saturday morning. - Remaining unsettled through the weekend and into early next week. Temperatures will gradually warm toward normal by mid week. && .SHORT TERM /Through Sunday Night/... Issued 238 AM MDT FRI APR 24 2026 An upper low will remain over the Northern Plains / Southern Canada through the short term. A weak shortwave trough will dive down the backside of the low today and clip the northern part of our area. This will produce scattered snow showers across the west-central Idaho mountains with dry conditions elsewhere. Despite snow levels on mountain valley floors, any accumulations will be minimal. Highs today will be 5-10 degrees below normal. Winds will be breezy this afternoon across southern Idaho with gusts 20-35 mph. With a cool airmass in place, light winds, and mostly clear skies, temperatures will dip to near or below freezing tonight in agricultural valleys. A Freeze Watch remains in effect for these areas. Additional shortwave energy dropping down the backside of the low will merge with a broad upper level trough over California over the weekend. The resultant broad trough over the Pacific Northwest will keep temperatures cool with a 20-50% chance of showers over the higher terrain along with a 10% chance of thunderstorms each afternoon. Snow levels will be 4000-5500 feet, with minor accumulations possible on higher peaks. Winds will be lighter on Saturday, then breezy again Sunday as surface low pressure moves over eastern Idaho. Areas of frost will develop Saturday and Sunday nights, but lows should not be as cold as tonight. && .LONG TERM /Monday through Friday/... Issued 238 AM MDT FRI APR 24 2026 A broad upper level trough will remain over the Pacific Northwest on Monday and Tuesday, followed by upper level ridging Wednesday through Friday. A 20-50% chance of showers, highest chance over the mountains, and a 10% chance of thunderstorms will continue on Monday. Precipitation chances will begin to trend lower Tuesday, then settle at around 20% over the mountains each afternoon late week with lower chances elsewhere. Ridging will bring warmer temperatures, increasing to near or slightly above normal by mid to late week. Winds will be lighter under this pattern. && .AVIATION /12Z Friday through Saturday/... Issued 544 AM MDT FRI APR 24 2026 Mainly VFR. Scattered snow showers today over the west-central ID mtns, mainly east of KMYL. Brief MVFR/IFR conditions and mountain obscuration in snow showers. Surface winds: NW-N 10-20 kt, gusts to 30 kt KMUO east to the Magic Valley terminals. Winds aloft at 10kft MSL: NW-N 15-30 kt. KBOI...VFR. Surface winds: NW 10-15 kt with gusts up to 25 kt. Weekend Outlook...Generally VFR. Scattered showers developing over the higher terrain each afternoon. Brief MVFR/IFR conditions and mountain obscuration in showers. Isolated rain showers over the valleys. Slight chance of afternoon thunderstorms near the NV border. Snow levels 4-6kft MSL. Surface winds: variable 10 kt or less Saturday, W-NW 5-15 kt Sunday with gusts to 25 kt KMUO east to the Magic Valley terminals. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...Freeze Watch from late tonight through Saturday morning for IDZ012-014-016. OR...Freeze Watch from late tonight through Saturday morning for ORZ064. && $$ www.weather.gov/Boise Interact with us via social media: www.facebook.com/NWSBoise www.x.com/NWSBoise AVIATION.....ST SHORT TERM...ST LONG TERM....ST

805 FXUS65 KLKN 240701 AFDLKN Area Forecast Discussion...Updated National Weather Service Elko NV 1201 AM PDT Fri Apr 24 2026 .KEY MESSAGES... * Next round of precipitation is expected this weekend with generally unsettled weather into next week * Cooling trend this weekend * A few strong thunderstorms possible both Saturday afternoon and Sunday afternoon && .UPDATE... Issued at 1201 AM PDT Fri Apr 24 2026 The current forecast is on track. No updates are planned. && .DISCUSSION... (Today through Thursday) WEATHER PATTERN OVERVIEW: West-northwesterly breezes this afternoon with temperatures warming into the 60s. Next round of active weather is expected by Saturday afternoon from the west as the low pressure over Canada continues to intensify and deepen into the western CONUS. Periods of valley rain and mountain snow expected to return to Nevada with greater amounts of precipitation over Central Nevada. Breezy westerly winds in the afternoon. The spring weather is expected to remain into early next week through Tuesday. Here are the probabilities of rain over the cities Saturday through Tuesday: Sat Sun Mon Tue Elko 25% 57% 32% 24% Ely 50% 88% 59% 24% Eureka 52% 63% 42% 28% Tonopah 49% 48% 13% 12% Winnemucca 18% 55% 17% 6% Wednesday through the rest of the week, models begin to show discrepancies with vastly different outcomes on weather patterns. The main consensus for Wednesday and Thursday is fairer weather conditions with warming temperature trends, but depending on the outcome of the models may have different weather conditions. && FORECAST CONFIDENCE & DEVIATIONS: High confidence of fair weather conditions and warming temperatures today. Moderate confidence of unsettled weather returning over Nevada this weekend with periods of precipitation. Low confidence of fair and warming temperature trends Wednesday and Thursday. No changes to NBM grids at this time. && .AVIATION... Look for VFR conditions over all terminals for the next 24 hour periods, with light northwesterly winds below 10 kts and improving CIG conditions into SKC. && .LKN Watches/Warnings/Advisories... None. && $$ DISCUSSION...97 AVIATION...97