305 FXUS66 KSEW 232246 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 246 PM PST Fri Jan 23 2026 .SYNOPSIS...An upper ridge will remain over Western Washington through the weekend. Cold temperatures are expected during the overnight periods. A weak system will brush the coast on Monday. The ridge will rebuild Tuesday before moving inland on Wednesday as another weak system may reach the area. && .SHORT TERM /TODAY THROUGH SUNDAY/...Clear skies across the area this afternoon with an upper level ridge positioned offshore. Fraser Outflow continues this afternoon across western Whatcom County before weakening tonight. The upper ridge will promote dry conditions through the weekend. The main weather concern will be cold overnight temperatures Saturday and Sunday morning. Widespread overnight lows in the 20s are expected both mornings, with upper teens possible in localized locations. Temperatures in the metro areas will drop towards 25 degrees tonight into early Saturday, especially away from the water. For this reason, have issued a Cold Weather Advisory from Everett to Tacoma, including portions of the Kitsap Peninsula. The coldest temperatures will be away from the water, with temps near 30 along the Puget Sound coast. Make sure to wear appropriate clothing if you`re heading out this weekend. Additional Cold Weather Advisory headlines may be needed on Sunday. Otherwise, patchy freezing fog may develop each morning, mainly from Olympia southwards. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...The aforementioned upper ridge will flatten late Sunday through Monday as a weak weather system brushes Western Washington. At this time, any QPF amounts are expected to remain nominal, if any. The upper ridge then rebounds on Tuesday for dry weather and warming temperatures. The ridge axis shifts east Wednesday into Thursday as a system may approach from offshore. However, uncertainty continues in the ensembles in regards to the extent of precipitation over Western Washington, with approximately 40% of the multi-model ensemble (GEFS, EPS, GEPS) remaining dry solutions. Either way, little in the way of impacts are expected for any midweek precipitation. Temperatures will moderate on Tuesday and remain near to slightly above normal into late week. JD && .AVIATION...A high-amplitude ridge offshore is maintaining northwesterly flow aloft across western Washington today. VFR conditions prevail across the region with clear skies. These conditions will continue through much of tonight. There`s a chance (20-25%) that IFR or lower ceilings may develop early Saturday morning. Mostly clear skies will continue once again during the day on Saturday with increasing high clouds late. Northeasterly winds this afternoon around 5 to 10 kt (except gusts up to 25 kt at BLI) will slowly ease tonight, becoming light and variable overnight into Saturday morning. Mostly light N/NE winds expected throughout the day Saturday. KSEA...VFR conditions with clear skies. These conditions will continue through tonight, with 20-25% chance of IFR or lower ceilings between around 14-19Z Saturday. Winds NE 8-15 kt this afternoon will decrease to around 5 kt tonight, and remain around there through Saturday morning. 62 && .MARINE...Broad high pressure across the northeast Pacific will remain in place through the first part of next week. A weak thermal trough along the coast will keep offshore flow continuing through the rest of today, but winds will start to weaken tonight and through the weekend. The breeziest winds will continue through this afternoon in the entrance to the west Strait of Juan de Fuca, as well as through portions of the Northern Inland Waters. Gusts up to 20 to 25 kt will continue this afternoon in these localized spots. The next period of impactful marine weather doesn`t look to arrive until later Monday into Tuesday as a frontal system approaches the west coast and brings back increasing southerly winds. Seas 3 to 5 ft will continue this weekend, increasing to the 8-12 ft range Tuesday and into the middle of next week as systems move back into the area. 62 && .HYDROLOGY...No river flooding in the next 7 days. && .SEW WATCHES/WARNINGS/ADVISORIES... WA...Cold Weather Advisory from midnight tonight to 9 AM PST Saturday for City of Seattle-Downtown Everett / Marysville Area-Eastern Kitsap County-Eastside-Lowlands of Pierce and Southern King Counties-Shoreline / Lynnwood / South Everett Area. PZ...None. && $$

040 FXUS66 KPQR 232237 AFDPQR Area Forecast Discussion National Weather Service Portland OR 237 PM PST Fri Jan 23 2026 .SYNOPSIS...Dry weather continues through most of the weekend as high pressure remains over the region. Gusty winds persist through the Columbia Gorge. Expect cold overnight lows in the upper teens to mid 20s through Saturday night/Sunday morning in the lowlands. Clear skies and light winds away from the Columbia River Gorge will result in frost formation for the interior lowland valleys and coast range Valleys. Chances for precipitation return by the middle of next week, but details on the exact timing and impacts remain uncertain at this time. && .SHORT TERM...Tonight through Saturday Night...Fairly benign weather across the PacNW as high pressure continues to dominate the Pacific NW and NE Pacific Ocean. Clear skies today will bring about very cold overnight temperatures for the majority of the CWA. Expect overnight lows and wind chills (apparent temperatures) in the 15 to 25 degree fahrenheit range for all areas west of the Cascade Crests to include the Hood River Valley (65-95% probability) for at least 4 hours. Therefore, have issued a Cold Weather Advisory for the Lower Elevations of Northwest Oregon, and the Lower Elevations of Southwest Washington. While the Cascade Crests will also be very cold, they are not expected to fall below Cold Weather Advisory Criteria tonight. Cold overnight to morning temperatures will continue Saturday night into Sunday morning and Sunday night into Monday morning as high pressure persists, though the potential for Cold Weather Advisory criteria decreases substantially after Saturday night/Sunday morning. Transport winds have increased and as a result have helped to mix the air trapped at or near the surface. Therefore, have expired the Air Stagnation Advisory. However, transport winds do decrease towards the latter part of this weekend and into the start of next week. So, another Air Stagnation Advisory may be warranted, mainly for the Willamette Valley depending on how long conditions are expected to persist. /42/19 .LONG TERM...Sunday through Thursday...Models and their associated ensembles are starting to show a pattern shift next week as a trough digs across the Pacific. This may weaken the anchored ridge enough to finally see a substantial change by the middle/end of the upcoming week. Ensembles agree that a weak short wave and associated cold front will pass through the region during the Sunday night through Monday night timeframe. However, precipitation is negligible (if any) for the area with at most a few hundredths of an inch. Even if this system brings little in the form of precipitation, it will still play an important role in breaking the ridge down and setting the stage for more beneficial precipitation toward the middle/end of next week. Ensemble guidance remains in agreement that a moderate, Pacific low will finally break down the strong ridging over the region by midweek, though details are still unclear. At this time, model ensemble guidance is pointing towards a moderate PoP (35-60% chance) with relatively low/moderate QPF (0.10-0.50 inches total) event. At this point, there are no major impacts expected with this weather system, and if precipitation does occur, it would be more beneficial than impactful, especially after the recent dry spell. /42/19 && .AVIATION...Clear skies continue across the region as high pressure builds overhead. The near surface cross-Cascade pressure gradient remains in place this afternoon with gusts of 25-35 knots observed at sites like KTTD and KPDX, likely continuing into the evening before decreasing (at least a KPDX). Tonight into Saturday morning, temperatures drop below freezing for most inland sites with frost accumulation possible on surfaces where winds are light. We still need to keep an eye on a chance (25-30%) for fog formation in the far southern Willamette Valley approaching sunrise which would impact KEUG - much lower chances for fog elsewhere. Otherwise, high confidence VFR conditions prevail the next 24 hours. KPDX AND APPROACHES...VFR conditions hold in place the next 24-hours with clear skies. Easterly winds continue to dominate into the evening hours with gusts up to around 30 knots before decreasing 03-06z with the loss of daytime heating. -99 && .MARINE...Expect fairly benign conditions, especially by January standards, to continue across the coastal waters the next several days. East to northeasterly winds have increased this afternoon as a thermal trough along the coast expands northward and high pressure rebuilds inland. Winds generally increase to around 10-15 kt with gusts up to 20 kt, but isolated gusts to 25-30 kt will be possible extending from the coast range gaps across the coastal waters. Winds slowly decrease the latter half of the weekend followed by a switch to southerly winds on Monday as a weak weather disturbance passes by primarily to our north. Through early next week wave heights hold between 3-6ft. Our next frontal system of note likely approaches the waters by the middle of next week increasing chances for Small Craft Advisory conditions, particularly on Wednesday. Given the uncertainty in the track and strength of this disturbance, confidence decreases in the wave height forecast mid-week onward but the GEFS does indicate a 20-30% chance for wave heights to exceed 15 ft as early as Wednesday evening. -99/19 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...Cold Weather Advisory from 10 PM this evening to noon PST Saturday for ORZ101>125. WA...Cold Weather Advisory from 10 PM this evening to noon PST Saturday for WAZ201>210. PZ...None. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland

673 FXUS66 KMFR 232137 AFDMFR Area Forecast Discussion National Weather Service Medford OR 137 PM PST Fri Jan 23 2026 .DISCUSSION (Today through Thursday)... Key Points: * Widespread precipitation-free conditions through early next week - Morning fog may becoming less prevalent the next couple days * Cold airmass this weekend - Freeze warning in effect for our northern coastal areas - Cold weather advisory in effect for the valleys of Douglas Co. - May need to expand cold weather advisories the next morning Further Details: Fog and freezing fog has been the main weather impact lately along with the stable airmass, but we may see the fog chances less common this weekend and we see better atmospheric mixing. While some areas may still see fog/freezing fog, areas in and around Douglas County may get some relief tonight. This is part of the reason for the cold weather advisory as radiational cooling may be stronger without the low clouds/fog. However, this is also part of the uncertainty for the cold temperatures because if the fog forms again, we may not get as cold tonight. In other words, some uncertainty does exists for tonight low temperatures and the fog (or lack thereof) will be the primary driver. Probabilities from ensemble data do indicate there is a lesser chance for fog tonight across Douglas County. Currently there is about a 20% chance for visibilities less than half a mile. The next morning will be colder for some areas across northern California, and we may meet criteria (6 - 15 degrees) for western parts of Siskiyou County. This is different than Douglas County where we only need to be 16 to 25 degrees. This would primarily impact both Shasta and Scott valley Sunday morning. In similar fashion we may need another freeze warning for northern coastal areas due to temperatures below freezing once again tonight. Looking ahead, the next reasonable chance for widespread precipitation may come middle of next week. The trend lately has been for dry conditions to prevail, even as chances come into the extended only to disappear once we get closer in time. This is leading to some uncertainty for next week. Ensemble data is indicating the probability for 0.10"/6 hrs is around 10-25 percent starting Tuesday night. These chances are for westside areas with coastal areas being on the higher end. These probabilities are less than they were 24 hours ago. -Guerrero && .AVIATION (18Z TAFs)... Satellite and observations show passing mid-/high clouds east of the Cascades with lingering low clouds (IFR/LIFR ceilings) in the Umpqua Basin at Roseburg and in the western Rogue Valley near Grants Pass. Medford has VFR conditions with 4kft-06kft ceilings. The system arriving from the north could allow for just enough mixing today to improve conditions to VFR at the locations with low clouds/fog right now. This is forecast to clear into this afternoon. The next area of concern will be low clouds/fog tonight, especially for west side valleys. This TAF cycle includes MVFR visibility for the Roseburg area between 05Z-14Z, but there is a lower confidence for fog development. However, that will mean it will be a cold night ahead with temperatures falling to the 20s west of the Cascades. VFR conditions are forecast through the TAF period for the other TAF sites, including Medford, as well. -9 && .MARINE...Updated 100 PM PST Friday, January 23, 2026... North winds have been increasing today. Seas are steep and hazardous to small craft south of Cape Blanco, especially beyond 10 nm from shore. Winds will gradually diminish and shift to the northeast, but also spread to areas north of the Cape on Saturday. Conditions are expected to improve early next week. A more active pattern is expected to follow later next week. && .MFR WATCHES/WARNINGS/ADVISORIES... OR...Freeze Warning from 1 AM to 10 AM PST Saturday for ORZ021. Air Stagnation Advisory until 4 PM PST this afternoon for ORZ023- 024-026-029>031. Cold Weather Advisory from 7 PM this evening to 11 AM PST Saturday for ORZ023. CA...None. PACIFIC COASTAL WATERS...Small Craft Advisory until 1 AM PST Sunday for PZZ356-376. Small Craft Advisory until 1 AM PST Sunday for PZZ350-370. && $$

482 FXUS66 KEKA 232234 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 234 PM PST Fri Jan 23 2026 .SYNOPSIS...Clearer and more dry conditions will settle across the area this weekend with some particularly cold mornings with lows near freezing. Conditions will slightly warm and moisten next week with increasing chances of wetting rain late in the week. && .DISCUSSION...Increasing offshore flow and drier air has enabled more widespread clearing today along the coast. Moderate northerly gusts ave also been felt across the area. Clear skies and dry air will enable cold overnight conditions, particularly tonight and Saturday nights. Lows will most likely be right around freezing. Tonight, there is a roughly 20 to 40% chance of interior valley lows below 30 degrees with a 10% chance closer to the coast. Generally speaking, stubborn valley dewpoints above 40 will likely inhibit very cold conditions tonight. Dewpoints will have to be watched closely this evening in case a cold weather advisory is justified. Chances increase Saturday night with interior probabilities of 50 to 70%, though near coastal probabilities remain low near 10%, likely thanks to shallow fog formation and returning upper level clouds. Such temperatures could pose a risk to sensitive outdoor plants and those without housing. Conditions will slightly warm but greatly moisten early next week as a weak warm front alongside a push of southerly winds crosses the area around Tuesday. Increasing midlevel clouds will generally both limit the high temperature potential and increase overnight lows. There is high model agreement that a weak and quick moving trough will cross the area behind the warm front sometime around Wednesday. This trough will bring the first real chances of wetting rain since the first week of January. Rain, should it occur, will most likely be relatively evenly spread across the area from North to South with only a slight focus on the North Coast. There remains very high model spread in terms of rain amounts, though amounts have generally decreased in the most recent models. Currently, there is a 50% chance of no rain or only a few sprinkles even for the coast. The forecast is even drier for the interior. For low elevations, model means over 48 hours are around 0.2 to 0.5 inches, with little to no chance of rainfall over 1 inch. In any case, more moist conditions are essentially certain, even should no rain occur, and at the same time even the very high end of forecast will pose little to no flood risk given the recent dry period. Long range ensembles show generally good agreement that a wetter pattern will then continue through the end of January. Again, model spread remains high with round of light to moderate rain being most likely through next weekend. /JHW && .AVIATION...FR conditions were firmly in place across N CA Friday afternoon. Stratus formation is possible around Humboldt Bay, but developing easterly winds should keep the stratus out of ACV. Early morning fog has been included for UKI in the TAFs for after 12Z Saturday. Easterly to northeasterly winds will strengthen up to 40 kts aloft near 2000 ft AGL over some of the ridges. This will bring a risk for low level wind shear, particular over the ridges of Lake/ Southern Mendocino counties and far Southern Humboldt. Northerly winds gusting to 25 kts along the coast and CEC will ease and turn calm to light easterly Friday evening through Saturday. && .MARINE...Northerly winds continue to increase and will peak this afternoon and evening with Gale force gusts in the outer waters, while gusts of 20 to 25 kts are occurring in nearshore waters. Very steep seas of 9 to 12 ft are building and will peak in the evening and overnight. Winds and seas ease tonight and through the weekend. A series of mid-period west swells fill in over the coming days, each peaking at around 5 ft. Southerly winds increase early next week, and may create advisory level wind gusts in the outer waters Tuesday. JB/JJW && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 3 AM PST Saturday for PZZ450-455. Gale Warning until 3 AM PST Saturday for PZZ470-475. && $$ 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

658 FXUS66 KMTR 232011 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 1211 PM PST Fri Jan 23 2026 ...New SHORT TERM, LONG TERM... .KEY MESSAGES... Updated at 1209 PM PST Fri Jan 23 2026 - Gusty offshore winds across higher terrain of the North Bay and East Bay Friday night through Sunday morning - Morning fog across some Bay Area Valleys - Potential weak storm system in the middle of the next work week && .SHORT TERM... Issued at 1209 PM PST Fri Jan 23 2026 (This evening through Saturday) Low clouds linger across much of the lower elevations across the region this afternoon as the return of a ~1500 ft marine layer returned overnight. In addition, tule fog from the Central Valley as pushed westward into the East Bay Valleys. By mid afternoon, mostly sunny sky conditions are forecast expect for locations near the coast where the marine layer persists. Expecting offshore winds to develop across the higher elevations of the North and East Bay valleys tonight and persist into Saturday. Localized gust may exceed 50 mph in some of the peaks across the region. This will dry things out considerably in these areas which may also mix down into the valleys on Saturday. However, winds are not forecast to be strong in the lower elevations. Afternoon humidity values are likely to fall below 20% in the higher terrain. Saturday, we are expecting offshore winds to persist in the higher terrain. This offshore flow will work to compress the marine layer and essentially completely mixing it out. Thus, a slight warm up in temperatures can be expected with low to mid 60s for much of the region. && .LONG TERM... Issued at 1209 PM PST Fri Jan 23 2026 (Saturday night through next Thursday) Offshore winds look to diminish Saturday night into Sunday morning, yet will still be moderate in the higher terrain. Therefore, low clouds cover and/or fog will have a difficult time developing early Sunday morning with continued offshore flow aloft. However, high clouds will will begin to spread in from the west by that time. From the previous forecaster: "The ridge looks to flatten into Sunday evening, with a zonal jetstream pattern taking its place, and offering more onshore flow. However the jetstream looks to snap back to a quick ridge into the next work week. This means temperatures will and some bounces up and down by a few degrees, and low cloud formation will be spotty. Despite the quick ridge development, high clouds look to move through the region as a trough develops to the west. The trough formation is well-argeed upon between the longer term models, but the trajectory is a matter of debate. More models point to a cold front, and maybe a weak low pushing through the area, bringing good chances for widespread moderate rains by the mid week. However, the GFS and its ensemble members seem keen on this trough getting pushed up against the ridge ahead of it, and placing all the moisture well to the north. The GFS output looks a bit less firm than other models and the national blend, but is something to keep in mind as the longer term models update. For now, the official forecast places rain chances in the middle of the next work week along the initial front with additional chances possible beyond the forecast period." && .AVIATION... (18Z TAFS) Issued at 956 AM PST Fri Jan 23 2026 Satellite imagery shows almost all of the Bay Area and Central Coast socked in with fog and stratus, unless your over 3000 or 4000ft elevation. The question for today becomes, will we be able to mix out? Model guidance has not been the greatest with many showing clearing happening around 18Z. MOS guidance might be the most pessimistic, with some sites potentially being locked in through the day. Opted to trend more pessimistic given the spread of this and the lack of clearing. Should this tule fog and stratus stick around, expect MVFR to IFR cigs at the terminals through the period. If we`re able to mix out and get winds a little breezier, we may get some VFR conditions for a few hours. Tonight, the forecast is difficult once again. Opted to go pessimistic for most TAF sites as well given models have struggled this morning. Look for another night of MVFR to LIFR conditions. Vicinity of SFO...Moderate to low confidence in the SFO forecast. Opted to trend with cigs clearing later this afternoon and then staying VFR through the period. Given most guidance has low clouds flirting around SFO, opted to keep the mention of FEW015 and SCT010 in the forecast. Some guidance shows 20-40% chance of BKN MVFR cigs overnight, with cigs eroding shortly after sunrise. Will need to keep an eye on the overall forecast given the current cloud deck over the region. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...MVFR to IFR cigs are being observed this morning and these should remain locked in through the period. We should see a brief period of onshore winds this afternoon, otherwise winds look to be light and variable. && .MARINE... (Today through Wednesday) Issued at 841 AM PST Fri Jan 23 2026 Fresh to strong northerly breezes will prevail today with near gale force gusts in the northwest waters. Elsewhere, gentle to fresh northerly winds prevail. Seas will build to 8-12 feet across exposed waters today through early Saturday. Conditions will improve this weekend with a gentle breeze and moderate seas. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...Small Craft Advisory until 3 AM PST Saturday for Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...RGass LONG TERM....RGass/Murdock AVIATION...KR 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

574 FXUS66 KOTX 232300 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 300 PM PST Fri Jan 23 2026 .KEY MESSAGES... - Colder temperatures this weekend with overnight lows in the teens to low 20s - Quiet weather pattern through next week - Temperatures moderating for the middle to end of next week && .SYNOPSIS... Colder temperatures are expected this weekend with overnight lows in the teens to lower 20s. A quiet weather pattern is expected through next week. && .DISCUSSION... Tonight through Sunday: A drier northerly flow is expected to bring a continued trend of clearing skies heading into the weekend. This will result in colder overnight low temperatures in the teens to low 20s. There are a couple initial exceptions to the clearing, with one area being the Cascade valleys in Chelan county, as well as the Palouse/LC Valley where it is taking longer for the dry air to mix down. Higher resolution models do hang onto some boundary layer moisture into Saturday morning for these two areas which is expected to lead to continued areas of stratus, as well as patchy freezing fog overnight into Saturday morning. But eventually the dry air should win out as precipitable water values hover around 40-60 percent of normal through the weekend. Monday through Friday: Ensembles show a split flow pattern with incoming weak fronts stretching and falling apart as they track into Eastern Washington and North Idaho. Thus precipitation chances are low through the week, with a 20-30% chance limited to near the Cascade crest and ID Panhandle mountains starting on Wednesday. These weak systems however will help moisten the low levels as the lower level flow switches from north to west and southwest. This has the potential to bring some increase in boundary layer moisture with areas of low clouds and fog during the overnight and morning hours. Although at the same time the passing mid level clouds will help mitigate this, leading to overall low confidence in precise mixing heights and air stagnation potential next week. Longer range outlook going into the first week of February heavily favors a mild weather pattern. Thus for the next two weeks the outlook for both lowland and mountain snow looks bleak. JW && .AVIATION... 00Z TAFs: Drier air continues to move in from the north leading to clearing skies, except for a deck of lingering MVFR stratus around KPUW, and VFR stratus over KLWS. Models show this stratus deck gradually clearing this evening. Although boundary layer moisture lingers, with some increase in IFR/MVFR stratus anticipated during the overnight hours into Saturday morning. There is a small chance that southerly boundary layer winds advect this stratus towards KGEG/KSFF/KCOE Saturday morning but this comes with low confidence. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Alternate scenario is a moist boundary layer over the palouse lingers without clearing of the IFR stratus into the evening, with more aggressive expansion northward toward KGEG Saturday morning as boundary layer winds shift out of the south. There is low confidence that this scenario occurs. JW ----------------------- 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 17 28 17 30 20 32 / 0 0 0 0 0 0 Coeur d`Alene 16 29 16 31 19 35 / 0 0 0 0 0 0 Pullman 19 28 19 32 24 36 / 0 0 0 0 0 0 Lewiston 22 32 21 36 26 40 / 0 0 0 0 0 0 Colville 15 29 15 29 17 32 / 0 0 0 0 0 0 Sandpoint 16 27 18 29 19 32 / 0 0 0 0 0 0 Kellogg 16 26 15 32 21 36 / 0 0 0 0 0 10 Moses Lake 19 33 18 34 22 34 / 0 0 0 0 0 0 Wenatchee 23 33 22 31 25 34 / 0 0 0 0 0 0 Omak 20 33 19 31 22 33 / 0 0 0 0 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...None. ID...None. && $$

113 FXUS66 KPDT 232229 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 229 PM PST Fri Jan 23 2026 .DISCUSSION... High pressure remains over the region. A weak shortwave was moving across the Pacific Northwest. However, this feature is not strong enough to displace the stubborn low clouds. The ridge will gradually build back in over the weekend, so expect more of the same. Very light freezing fog/snow freezing drizzle continues in spots which can make roads, sidewalks and other areas slick. For now, have issued a winter weather advisory for central Oregon, but will have to monitor other locations as well. By Monday, the flow will turn more westerly as a weak trough moves onshore Monday night. While this feature is stronger than today`s system, it is still probably not enough to clear out most of the stratus. The high will quickly build back in behind this system. Another potentially stronger system will approach around the midweek period and bring some low precipitation chances (20-30 percent), mainly to the mountains. This is perhaps the best chance of finally clearing out some of these stubborn clouds, but it is too soon to tell if this system will be able to accomplish that task, as there are differences in the guidance that far out. However, any clearing could be short-lived as the ridge builds back in toward the end of next week. As long as the stratus remains around, temperatures will continue to be below normal, in some cases 10 to 15 degrees or so. Guidance does suggest a return to more normal temperatures next week, if we are able to scour out some of these clouds. && .AVIATION... 00Z TAFS...Conditions range from VFR to LIFR and not much change is expected. There could be some afternoon improvements and evening/night decreases. && .PRELIMINARY POINT TEMPS/POPS... PDT 28 22 28 23 / 10 10 10 0 ALW 30 23 30 23 / 10 10 10 0 PSC 34 25 33 25 / 0 0 0 0 YKM 31 26 30 25 / 0 0 0 0 HRI 32 25 32 25 / 10 10 10 0 ELN 28 23 27 23 / 0 0 0 0 RDM 27 20 29 20 / 10 10 10 0 LGD 30 23 30 23 / 0 0 0 0 GCD 27 20 28 21 / 0 0 0 0 DLS 34 26 34 27 / 0 0 0 0 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...Winter Weather Advisory until 11 PM PST this evening for ORZ511. WA...None. && $$ SHORT TERM...77 LONG TERM....77 AVIATION...77

489 FXUS65 KREV 232019 AFDREV Area Forecast Discussion National Weather Service Reno NV 1219 PM PST Fri Jan 23 2026 .KEY MESSAGES... * Gusty northeast to east ridge winds return tonight through Saturday night, with chilly breezes for western Nevada valleys. * Saturday will be the coldest day of the upcoming week, with hazardous wind chills near or below zero degrees for Sierra backcountry areas. * A slow warming trend will bring back the valley inversions next week, then a weak weather system may bring chances for light showers, mainly along the Sierra mid-to-late next week. && .DISCUSSION... Afternoon highs will drop 5-10 degrees tomorrow, with highs in the low 40s and low 30s across valley locations and the upper elevations, respectively. This is due to a cold front dropping in from OR late tonight through Saturday. Said cold front will also bring increased winds, mainly along ridges, with north/northeasterly gusts up to 50 mph. Wind chill values will drop to near or below zero Saturday morning, aligning with the peak in winds in the late morning/early afternoon timeframe. For backcountry recreators, make sure to bundle up, especially in the morning hours as those cold wind chill values will increase the threat for frostbite and/or hypothermia. After Saturday, highs rise back to near normal with highs in the upper 40s and low 40s for valleys and high elevations, respectively. Ridging settles back into place Sunday, continuing through the majority of the next week. This will introduce a slight warming trend and bring back valley inversions and light winds. This will renew the chances for hazy skies and freezing fog for fog-prone Sierra valleys. A low pressure system may bring increased chances for precipitation Wednesday/Thursday, though chances are low for now (15-20%). Snow levels are around 6-6.5 kft for that time frame but there is plenty of time for things to change. Stay tuned for more details as we get closer! -Giralte && .AVIATION... VFR conditions expected for the majority of the weekend, with the exception of the overnight hours through tomorrow afternoon where MVFR conditions are likely due to low cloud cover. This is due to an incoming cold front, which will also increase winds with gusts up to 45 kts along ridgetops. Localized areas of LLWS are likely with these increased winds. FZFG is also possible (20% chance) at KTRK again tonight. However, if those winds pick up and mix in, it`ll be harder for fog to form. -Giralte && .REV Watches/Warnings/Advisories... NV...None. CA...None. && $$

119 FXUS66 KSTO 232052 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 1252 PM PST Fri Jan 23 2026 .KEY MESSAGES... - Valley low clouds/fog potential through Saturday morning. - Fog potential diminishes Saturday-Sunday as north to northeast winds increase tonight into Saturday. Strongest gusts over the mountains. - Dry weather prevails this weekend, followed by renewed fog potential early next week. && .DISCUSSION... ...Today Through Sunday... Current GOES-West satellite imagery shows diminishing fog and low clouds across the Valley this afternoon as an upper low continues it`s path across southern California. The Dense Fog Advisory has been allowed to expire at 1 PM, although patchy areas of fog still persist across the Valley. Fog chances return tonight into tomorrow morning. Probabilities for visibilities 0.5 mile or less are 40 to 60% from the southern Sacramento Valley and southward, with the highest probabilities around the Sacramento metropolitan area. Remember to use low-beam headlights when driving through fog, exercise caution, and slow down. As northerly winds increase this afternoon and into tonight, any fog present should quickly diminish. Strongest winds are expected Saturday along the western side of the Sacramento Valley (I-5 and westward) and in the mountains. Probabilities of gusts in these areas are 60-80%. Relative humidities will also trend lower over the weekend with these winds, especially over the mountains, foothills, and in the northern Sacramento Valley. No precipitation is expected with this weekend`s system. ...Next Week... As ridging builds back in early next week the potential for Valley low clouds/fog returns, though exact chances remain uncertain for the time being. Otherwise, cool and calm weather is expected for the start of the week. Mid to late next week a slight chance for unsettled weather returns as troughing attempts to move into the area. Ensembles show a range of solutions, though all of them are limited to minor impacts at most. Some solutions have dry weather through next week, while others show light rain and a dusting of high elevation snow. Check in with the forecast periodically for updates. && .AVIATION... VFR conditions prevail at RDD and RBL through the forecast period with lingering MVFR/IFR conditions in BR/FG and low clouds expected across the Delta, northern San Joaquin Valley, and remaining Sacramento Valley. VFR conditions on the fringes of the fog/stratus deck may briefly spread inward after 00z. Widespread IFR/LIFR in FG/BR then redevelops after 03z-06z Friday with similar areal extent excluding the northern Sacramento Valley. Increasing northerly winds gusting 15-25 kts develop after 06z Saturday across the northern Sacramento Valley and extend southward after 12z. Stronger east-northeast winds anticipated along the Sierra after 06z, with gusts 30-40 kts. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$

469 FXUS65 KMSO 231904 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 1204 PM MST Fri Jan 23 2026 .DISCUSSION... KEY MESSAGES: - Cold temperatures through the weekend, with below zero wind chills along the divide. - Light snow event along the divide and in southwest Montana Saturday into Sunday. - Stagnant and dry weather pattern next week (January 26-30). Arctic air continues to move westward across the Northern Rockies this afternoon, driven by a modest pressure gradient and an 1044mb surface high positioned over Great Falls. Below zero wind chills have been observed along the divide, especially over the higher terrain. GOES Satellite imagery highlights stratus clouds across west-central MT and north-central ID. Recent trends suggest this cloud deck will continue to erode this evening into the overnight hours, with clearing skies allowing for cold temperatures into Saturday morning. The next weather system arrives Saturday into Sunday morning. Model guidance highlights a shortwave trough moving southward from Canada along the divide. As discussed previously, the track and depth of moisture with this system remains a challenge within forecast guidance. The latest forecast points towards higher PoPs, QPF, and Snow Amounts along the divide into southwest Montana. Light snow will generally develop across the Glacier Park region Saturday morning/afternoon, before spreading into Southwest Montana by the evening into Sunday morning. Overall, snow accumulations will be light with most areas seeing a trace to 1 inch, with localized areas of 2-4 inches. A second push of arctic air will impact the divide Sunday morning, with another round of below zero wind chills for higher elevation areas such as MacDonald, Homestake, and Marias Passes and Georgetown Lake and vicinity. Snow as far west as the US-93 corridor can not be ruled out Saturday night into Sunday morning, with a 15-20% chance of measurable snowfall. Drier conditions will return Sunday night into Monday as the weekend system exits. The latest model guidance suggests clearing skies Sunday night into Monday morning, allowing for efficient raditional cooling. Lows could plunge well into the single digits or below zero in the colder valleys. Next Week (January 26-30): The main story next week will be the return of a strong ridge of high pressure across the Western US. Global ensembles suggest a split flow weather pattern off the western US coast, with the Pacific jet aimed well north, in Canada and Alaska. This leaves the Northern Rockies under stable and stagnant conditions leading to the development of valley inversions. Previous discussions mentioned a low risk for overrunning light snow and freezing rain by mid-week; however, recent guidance has trended further away from this solution, with ensembles now showing less than a 5 percent chance for this scenario. && .AVIATION...East winds from across the Continental Divide are bringing a cold, dry air mass into the region. The result has been a slow erosion of the stratus over the region. With the dry air mass over the region, it will get very cold tonight and Saturday morning with single digit temperatures at most terminals. A ridge of high pressure building over the region through early next week means that the fog and stratus will eventually become reestablished over the region, but that will take time, probably at least a couple of days. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...None. && $$

337 FXUS65 KBOI 232150 AFDBOI Area Forecast Discussion National Weather Service Boise ID 250 PM MST Fri Jan 23 2026 .SHORT TERM...Tonight through Sunday night...Seeing signs of drier and cold air working in on northerly flow aloft as low clouds have begun to erode this afternoon. Drying aloft will continue through tonight, expanding the erosion of clouds across portions of SE Oregon and the lower Snake Plain. In the Snake Plain, Boise will be on the edge of clearing overnight with areas to the south and east likely remaining under clouds through midday Saturday. Have growing confidence that all areas break out of the low clouds by tomorrow afternoon. A secondary trough will drop along the Cont. Divide on Sunday, keeping the region in a cold northerly flow. While temperatures will remain below normal this will keep any widespread fog or low clouds from developing through Sunday night. Any precipitation threat from these upper waves remains well east of the area. .LONG TERM...Monday through Friday...A slight warming trend from warmer air aloft are expected Monday through Tuesday, as a well amplified ridge begins building into the region. This ridge will strengthen Tuesday and Wednesday, likely favoring the return of valley inversions. With inversions, the valleys would continue to experience below normal temperatures and mountains above normal temperatures. From Thursday through Friday, a closed upper low digging off north/central California is looking to stay south of the area, but still likely to break the ridging and valley inversions by the end of the week. For now, conditions are expected to remain on the dry side for the entire week ahead. && .AVIATION...MVFR-IFR stratus continues in the valleys generally below 5000 feet MSL, with more IFR near KTWF and KJER. Surface winds W-NW 5-15 kt, with gusts 20-25 kt in higher terrain of E`rn OR near KBKE. KBOI...MVFR ceilings, with a 10-20% chance of IFR conditions returning after sunset. Conditions expected to improve Saturday afternoon after 20Z. Surface winds NW 7-12 kt. Weekend Outlook...Areas of MVFR-LIFR low clouds and fog Saturday clearing to VFR in the afternoon, except in Magic Valley (KTWF and KJER). Surface winds NW 5-15kt Sat afternoon. Sunday VFR with light winds. Low clouds and fog lingering near KJER KTWF. && .AIR STAGNATION...Afternoon satellite imagery showing arrival of cold and drier air aloft as low clouds are eroding from northwest to southeast. Expect this trend to continue into this evening across the lower Snake Plain and SE Oregon zones. Combination of vertical mixing ~2kft AGL and near surface winds around 10 mph are likely enough to clear out the stagnant conditions across the region on Saturday, though it is borderline at the lowest elevations. The return of an upper ridge and accompanying inversion will start another period of stagnant conditions. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...Air Stagnation Advisory until noon MST Saturday IDZ011>014-016-028-033. OR...Air Stagnation Advisory until noon MST /11 AM PST/ Saturday ORZ061>064. && $$ www.weather.gov/Boise Interact with us via social media: www.facebook.com/NWSBoise www.x.com/NWSBoise SHORT TERM...DG LONG TERM....JY AVIATION.....JY AIR STAGNATION...DG

886 FXUS65 KLKN 232001 AFDLKN Area Forecast Discussion National Weather Service Elko NV 1201 PM PST Fri Jan 23 2026 .KEY MESSAGES... Updated at 1201 PM PST Fri Jan 23 2026 * Turning colder today and Saturday * Scattered, light snow showers in Eastern Nevada tonight into Saturday morning * Near zero degrees apparent temperatures in the coldest valleys of Northern and Central Nevada Saturday night * Warming trend Sunday through Wednesday && .DISCUSSION... (This afternoon through Thursday) WEATHER PATTERN OVERVIEW: A cold front will approach Northeastern Nevada this afternoon. High temperatures this afternoon will be about five degrees colder than yesterday afternoon. The cold front will move southward across Eastern Nevada tonight into Saturday morning, resulting in scattered, light snow showers. Snow amounts will be less than an inch, except on passes and summits along Highway 50 east of Ely. Most of this light snow will fall tonight. Northwesterly flow aloft will keep cold air flowing into the service area Saturday afternoon and Saturday night. Maximum temperatures Saturday afternoon will be two to four degrees below seasonal values. Low temperatures Saturday night will be six to eight degrees below normal for this time of year. Minimum apparent temperatures in the coldest valleys of Northern and Central Nevada will be near zero degrees Saturday night. An Eastern Pacific ridge of high pressure will make landfall along the west coast of the United States Sunday. This ridge of high pressure will weaken as it passes through the Silver State Monday. Another ridge of high pressure will amplify near the west coast of the United States Tuesday. This ridge of high pressure will pass over the forecast area Wednesday, before weakening Thursday. A warming trend is expected Sunday through Wednesday. By Wednesday afternoon, high temperatures will be seven to nine degrees above normal for this time of year. Maximum temperatures Thursday afternoon will remain above seasonal values. FORECAST CONFIDENCE & DEVIATIONS: High forecast confidence regarding colder weather today and Saturday. Moderate forecast confidence in scattered, light snow showers in Eastern Nevada tonight into Saturday morning. High forecast confidence regarding near zero degrees apparent temperatures in the coldest valleys of Northern and Central Nevada Saturday night. Moderate forecast confidence in a warming trend Sunday through Wednesday. && .AVIATION... VFR conditions will prevail at all terminals through at least the next 24 hours. Brief, MVFR conditions are possible, but not likely, near snow showers in Eastern Nevada tonight into Saturday morning. KELY would be the most susceptible terminal. && .LKN Watches/Warnings/Advisories... None. && $$ 87