294 FXUS66 KSEW 022231 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 231 PM PST Mon Feb 2 2026 .SYNOPSIS... Showers and breezy winds will continue today as a warm front pushes northwrad. A high pressure ridge will build over the region through the remainder of the week, bringing in unseasonably warm and dry conditions with rounds of morning fog and low stratus. A pattern change is on tap for the weekend, with wet and cooler conditions returning. && .SHORT TERM /TONIGHT THROUGH WEDNESDAY NIGHT/... As an upper level ridge builds northward over the western US, a warm front will continue to lift northward across western Washington today. Light shower activity and breezy winds will continue to taper off throughout the afternoon and drift northward as the frontal system lifts into British Columbia. High pressure will continue to amplify over western Washington on Tuesday and Wednesday, allowing for drier and warmer conditions. However, morning fog and low stratus are likely to develop each morning and erode for most areas by the early afternoon. Cloudy skies will stick around on Tuesday, as a weak system tries to approach the coast. Areas along the northwest Olympic Peninsula and northern inland water coastlines may see a few sprinkles tomorrow, but measurable rain accumulations are not expected. Temperatures Tuesday will warm several degrees under the influence of the high pressure ridge, with most areas seeing highs in the mid to upper 50s. Much clearer conditions on Wednesday afternoon will allow for even warmer high temperatures in the upper 50s to lower 60s for most areas. && .LONG TERM /THURSDAY THROUGH MONDAY/... Operational forecast models and ensembles are both in good agreement over the ridge dominating the forecast through the remainder of the work week. This will maintain dry and warm conditions across western Washington through at least Friday, with potential for morning fog and low stratus and mostly clear afternoons. Temperatures through Friday are on track to peak in the mid to upper 50s. A pattern change is on tap by the end of the weekend, although some degree of uncertainty still remains over the timing. The ridge is favored to move eastward and out of the area by the end of the weekend as an upper level trough moves into the Pacific Northwest. This will bring in the next round of precipitation with snow levels lowering to near 4000 feet. After this system moves in, an active and unsettled pattern is favored to continue into next week. 15 && .AVIATION... The cold front has progressed to the east, with scattered showers pushing into the Cascades this afternoon. Isolated showers will continue this evening in portions of western Washington. Widespread MVFR to IFR cigs are leftover this afternoon, and will continue tonight. Expect light southerly flow to continue across the terminals into the overnight period, becoming variable overnight. High pressure is rebuilding, but will require more clearing for fog potential to develop (KOLM and a chance at PWT). A rebound to VFR cigs and light flow is expected after 21Z for most terminals tomorrow. KSEA...MVFR at the terminal this afternoon, with southerly flow of 10-12 kts. Rain has largely moved to the east, though periods of mist may be present throughout the evening and into the overnight period. Cigs are expected to remain MVFR throughout the night, with stratus likely in the morning not to get much lower than around 020. A return to VFR under weak ENE flow (4-6 kts) is expected after 18Z. 21 && .MARINE... Seas are going to remain elevated between 9-12 feet through tonight before easing up, with the winds also decaying into the rest of the afternoon. A decaying system well offshore could bring the seas back up to 10-12 feet again late Tuesday night into Wednesday, which would be the next time period with SCA potential. As high pressure builds in through the middle of the week, expect periods of marine fog over the next several days. Visibility restrictions in Puget Sound and the coastal waters are possible as fog and/or low stratus develops. 21 && .HYDROLOGY... A Flood Warning remains in effect for the Skokomish River in Mason County, as recent rainfall has caused the river to rise into minor flood stage. With little additional accumulation expected today, the river is forecast to crest later this evening and recede below flood stage Tuesday morning. Additional river flooding is not expected over the next 7 days. 15 && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...Small Craft Advisory until 4 PM PST this afternoon for Grays Harbor Bar. Small Craft Advisory until 1 AM PST Tuesday 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. && $$

653 FXUS66 KPQR 030021 AFDPQR Area Forecast Discussion National Weather Service Portland OR 421 PM PST Mon Feb 2 2026 Updated Beach Hazards discussion. && .SYNOPSIS...Decreasing showers across southwest Washington this evening, with dry conditions elsewhere. High pressure ridge builds over the Pacific Northwest on Tuesday, returning dry weather through Friday. Clear skies and calm winds will promote fog and frost potential across interior lowland valleys this week. Some interior valleys may also experience air stagnation. Easterly winds through the Columbia River Gorge will help prevent air stagnation in the Portland/Vancouver Metro Area and West-Central Willamette Valley. && .DISCUSSION...Today through Sunday...Radar imagery and surface observations as of early Monday afternoon depict rain across southwest Washington as a weakening warm front lifts across western Washington. Since this front is directed further north, the majority of northwest Oregon will remain dry. High resolution guidance suggests that rain will taper off into light, scattered showers through this afternoon with conditions eventually drying out by tonight as high pressure re-builds. Mid to high level cloud cover will begin to scatter out, favoring fog and/or low stratus development tonight across the Willamette Valley where winds are expected to be calm. Some light easterly winds through the Columbia River Gorge may prevent fog development, particularly in the far eastern Portland/Vancouver Metro Area. Will note that there is also some uncertainty with exactly where low stratus may develop. Some model soundings are showing east-southeasterly winds aloft around 1000-2000 ft which would prevent stratus, while surface winds remain calm or northerly under 5 mph. In this case, locations with this set up would favor fog development than low stratus. This would be more likely for areas not receiving the easterly surface winds from the Gorge. If you will be commuting through any fog tomorrow morning, make sure to slow down, use low beam headlights, and leave plenty of distance between you and other vehicles. Beginning tomorrow (Tuesday), deterministic and ensemble guidance remains in strong agreement that upper-level ridging becomes firmly established over the Pacific Northwest. This pattern will support an extended period of dry weather and above-normal temperatures through at least Friday. High temperatures are forecast in the upper 50s to low 60s, which is around 10 degrees above normal for this time of year. Mid to high level clouds will still linger over our area through Tuesday afternoon as a system in the NE Pacific rides the northwest periphery of the ridge and brings precipitation to western British Columbia. However, clouds should clear out and return sunny skies Wednesday to Thursday. Winds will generally be light throughout this period of dry weather, with the exception of the western Columbia River Gorge and surrounding terrain. Tightening pressure gradients will lead to breezy easterly gap winds, mainly on Wednesday and Thursday. There is still some uncertainty with how tight the pressure gradients between Troutdale and The Dalles will get, however deterministic and ensemble guidance suggests pressure gradients between these two places will be around -5 to -6 mb, potentially up to -7 to -8 mb. Chances for maximum wind gusts exceeding 35 mph are around 20-40% across the far eastern Portland/Vancouver Metro on Wednesday and Thursday, with higher chances of 70-90% through the western Gorge and surrounding terrain. There is also 30-50% chance that exposed ridgetops such as Three Corner Rock and Crown Point experience wind gusts exceeding 50 mph. For areas away from the Gorge, light winds and persistent ridging will result in stagnant air conditions which could affect air quality. An Air Stagnation Advisory has been issued from 4 AM Tuesday to 4 PM Friday across the Southern Willamette Valley, East Central Willamette Valley, North and Central Oregon Cascade Foothills, North Clark County lowlands, and the Lower Columbia River/Cowlitz River Valleys. Based on soundings and model guidance, mixing heights in these locations are forecast below 2000 feet with transport winds around 5 kt or less. Decided to leave out the Portland/Vancouver Metro Area and West Central Willamette Valley from the advisory as these areas will remain better mixed from the increasing easterly winds this week (these winds turn more northerly as it gets into West Central Valley). Other than air stagnation, high pressure will maintain chances for fog/frost this week across all interior lowland valleys. Chances for precipitation return this weekend, however there is still uncertainty with the exact timing and precipitation amounts. About 65% of ensemble members show precipitation returning by Saturday afternoon, while the rest show precipitation returning by Sunday afternoon. Most ensemble members also show 500 mb heights decreasing this weekend, which suggests that temperatures will also cool down. More details will be ironed out this week, but either way it`s looking like a wetter and cooler start to next week. -10/12 && .AVIATION...A frontal system is moving through far NW OR and SW WA Monday, producing showers near and north of KAST along the coast and north of the Columbia River for inland areas. Showers should end by 03-06z Tue. Mainly VFR conditions being observed across the region with BKN/OVC mid to high level clouds north of a line from KONP to KCVO. The exception is the far N OR/SW WA coast where IFR/MVFR ceilings will continue through around 06-10z Tue. Expecting the mid/high level clouds inland to become more scattered between 00-06z Tue from south to north. This clearing will allow for fog/low stratus formation across portions of the Willamette Valley. Areas south of KCVO, including KEUG, could see fog formation as early as 06-09z Tue as they will remain clear through most of the TAF period. For locations north of KCVO, including KSLE, KUAO, and KHIO, there`s a 40-60% chance of fog formation sometime between 06-12z Tue. There`s more uncertainty for Portland area terminals depending on wind direction. Some guidance suggests winds will remain from the east through the entire TAF period, which would inhibit fog formation, while other guidance suggests winds will briefly turn north to northwesterly, which could allow for better chances of fog formation. Any fog formation should improve to VFR conditions by 18-21z Tue. Expect light winds mainly less than 5 kts through the TAF period. KPDX AND APPROACHES...Predominately VFR conditions through the next 24 hours. Southeast winds around 10 kts calm to below 5 kts after 23z Mon. There`s a 20-30% chance of fog formation between 11-16z Tue. Uncertainty is due to uncertainty on wind direction. Some guidance suggests winds will remain from the east through the entire TAF period, which would inhibit fog formation, while other guidance suggests winds will briefly turn north to northwesterly, which could allow for better chances of fog formation. If fog does form, expect improvement to VFR conditions by 18-20z Tue. -03 && .MARINE...South winds with gusts 20 to 28 kts will slowly decrease this afternoon behind this morning`s weak front. Expect wind gusts to fall below 20 kts by 5 PM PST. Expect wave heights of 10 to 13 feet at 12 to 15 seconds through this evening. Due to a combination of winds and seas, a Small Craft Advisory is in effect through 1 AM PST on Tuesday. High pressure builds over the waters Tuesday with southerly winds less than 10-15 kts and seas less than 10 ft. Winds remain mainly south to southwest less than 10-15 kts through the rest of the week. By Wednesday, an increasing westerly swell is forecast to push into the waters, increasing seas to around 10-12 feet around 12-16 seconds through the end of the week. -12/03 && .BEACH HAZARDS...A long period westerly swell is continuing to pose a high threat for sneaker waves into tonight, with a Beach Hazards Statement is now in effect through 1 AM PST Tuesday for the coasts of northern/central Oregon and southern Washington. Waves will be able to run significantly farther up on a beach than normal, including over rocks and jetties. Sneaker waves can suddenly knock people off of their feet and quickly pull them into the frigid ocean which may lead to serious injury or drowning. Caution should be used when in or near the water, especially those who will be razor clamming this week. -42/36 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...Air Stagnation Advisory from 4 AM Tuesday to 4 PM PST Friday for ORZ108-115>118-123>125. WA...Air Stagnation Advisory from 4 AM Tuesday to 4 PM PST Friday for WAZ204-205. PZ...Small Craft Advisory until 1 AM PST Tuesday for PZZ210-251>253- 271>273. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland

015 FXUS66 KMFR 022355 AFDMFR Area Forecast Discussion National Weather Service Medford OR 355 PM PST Mon Feb 2 2026 ...Updated AVIATION discussion for 00Z TAFs... .DISCUSSION (Today through Sunday)... Key Points: * Little to no impacts expected until this weekend - Precipitation chances increase Sat/Sun - Snow levels dropping to 4500 Sun night - No hazards expected at this time * Morning fog thru Thurs for westside valleys and some eastside areas * Above normal temperatures and dry conditions will persist - Warmest days will be Tuesday - Thursday - Record warmth midweek for Alturas and Klamath Falls - Brookings may approach 70 degrees on Wednesday Further Details: The forecast turns largely dry the upcoming week with above normal temperatures. In fact, high temperature records may be met at Alturas and Klamath Falls midweek. Records are 65 (Feb 4th) and 64 (Feb 5th) for Alturas. Record is 59 for Klamath Falls on Feb 5th. Each of these days we are forecasting high temperatures within a degree or two of these records. A Rex Block (high pressure on the poleward side of a closed low) sets up at 500mb over the west coast starting tomorrow. This will keep the pattern stagnant through much of next week. The high of this Rex Block will be centered over the forecast area through middle parts of the week which will help aid our above normal temperatures for this time of year. This pattern does appear to break down Thursday into Friday as a closed low develops over the Pacific and enter the PacNW. This will bring our next chance at precipitation starting Saturday morning. A lot will depend on the strength of the high as this low could get pushed to the north. At this time, we are not seeing any noteworthy impacts from rainfall, but we will need to keep an eye on snow levels and wind speeds. Currently, the probability for 6.0" of snowfall in 24hrs is around 40% through Sunday night for a small area around Crater Lake. Otherwise, light snowfall possible at similar elevations. Again, at this time, we are not expecting widespread hazardous weather. -Guerrero && .AVIATION...03/00Z TAFs...VFR levels continue across northern California and southern Oregon this afternoon. Periods of fog development are in the forecast for North Bend, Roseburg, and Klamath Falls. There`s some additional uncertainty with North Bend, as offshore flow is forecast which tends to reduce fog development. Periods of patchy fog are possible for Medford, but drier air looks to limit fuller development. Any overnight fog looks to dissipate before Tuesday afternoon, allowing VFR levels to return to these areas. -TAD && .MARINE...Updated 200 PM PST Monday, February 2, 2026...Steep west seas will persist into tonight, then lower below advisory criteria for a brief time on Tuesday. Steep seas are likely to return Wednesday as another building west swell arrives and combines with a persistent southwest swell. These steep seas may continue through Friday. High pressure will maintain dry conditions through Friday. Then a front may move into the area and bring rain along with a potential for steep west-southwest seas on the weekend. && .MFR WATCHES/WARNINGS/ADVISORIES... OR...CA...None. PACIFIC COASTAL WATERS...Small Craft Advisory until 1 AM PST Tuesday for PZZ350-356-370-376. && $$

021 FXUS66 KEKA 022251 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 251 PM PST Mon Feb 2 2026 .SYNOPSIS...Dry weather is expected through the work week. Warm days and chilly mornings likely for much of the area. Rain possibly returns this weekend. && .DISCUSSION...High pressure has started to rebuild over the area, bringing mostly clear skies and dry weather. Some areas of valley fog have been observed in some of the river valleys with chilly overnight conditions also being observed with low temperatures in the 20s and 30s. This pattern is likely to continue for much of this week as high pressure remains overhead. High temperatures will likely trend upwards over the week, with mid 70s possible in some of the warmest valleys mid this week. The low sun angle and colder nights will prevent some of the valleys, like most in Trinity County, from seeing as warm of temperatures, with low to mid 60s forecast. Coastal stratus will keep temperatures moderated today and perhaps tomorrow, though once stratus scatters out in the afternoon, temperatures of high 50s to low 60s are likely. Offshore flow and a shallow marine layer will likely reduce coastal stratus by mid to late week, which could bring temperatures into the mid 60s, but also chilly temperatures in the mid to high 30s overnight. Long term ensembles are suggesting the ridge finally starting to break down by the weekend. Uncertainty is high with how this will develop. NBM is showing around 50% probabilities for over an inch of rain this weekend into early next week with higher probabilities in the higher terrain. However, NBM does show about a 20% chance for Mendocino and Lake Counties to remain dry. More detail will become clearer in the coming days. Stay tuned! JB && .AVIATION...VFR conditions prevail over most terminals in Northwest California through this afternoon. Another round of low clouds for coastal terminals may be possible tonight, but light offshore flow could reduce the coastal coverage. However, interior valleys will most likely see low clouds and fog overnight. KUKI could even see visibility reductions very early Tuesday morning. && .MARINE...A westerly swell will continue to move through the waters this morning with seas above 10 feet for most locations through late this afternoon. High pressure will build over the west coast this week with light winds expected over the coastal waters. Seas will subside on Tuesday into Wednesday with conditions likely to remain below small craft. Another large westerly swell will build into the waters Thursday into Friday with heights expected to be around 11-13 feet at 15 seconds. With winds remaining light to moderate, short period seas will remain small and westerly swells should be the dominating wave through the forecast period. /RPA && .BEACH HAZARDS...A long period westerly swell train continues today with heights between 10 and 13 feet with periods near 15 seconds. This swell may be too large for sneaker waves, though it could still pose a threat to beachgoers. Breakers up to 16 feet for west and northwest facing beaches are forecast based on average beach slope profiles today. Beachgoers venturing near or in the surf zone should remain vigilant. Avoid rocks, jetties and steep beaches. Another large swell may bring slight sneaker wave threat Thursday into Friday. /RPA && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 4 PM PST this afternoon for PZZ450-455-470-475. && $$ 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

351 FXUS66 KMTR 022340 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 340 PM PST Mon Feb 2 2026 ...New AVIATION... .KEY MESSAGES... Updated at 156 PM PST Mon Feb 2 2026 - Above normal temperatures and dry conditions through the work week - Hazardous beach conditions through this evening at Pacific Coast beaches - 20 to 40% chance of rain on Sunday across the region, with the higher amounts favoring the North Bay and the coastal mountains. && .SHORT TERM... Issued at 156 PM PST Mon Feb 2 2026 (This evening through Tuesday) The threat for minor coastal flooding is winding down as high tide has come and now past. The only other threat from the previous AD update is that the Beach Hazards Statement remains in effect for Pacific Beaches through this evening. Otherwise, quiet and dry weather continues through the short term thanks to high pressure building over the region. Temperatures tonight will be similar to last night or perhaps a few degrees warmer. Given the building high pressure system, tomorrow`s high temperatures will be warmer, putting most areas above their normal seasonal highs by 5 to 15 degrees. && .LONG TERM... Issued at 156 PM PST Mon Feb 2 2026 (Tuesday night through next Sunday) High pressure dominates the forecast through much of the work week, leading to a warming and drying trend through Wednesday. Cluster analysis shows an upper level trough developing off the California Coast Thursday into Friday, though there is some uncertainty as to where exactly it`ll be placed. This could spread some moisture in from the south for us, likely leading to an increase cloud cover and slightly cooler temperatures. The airmass should remain dry enough to keep any showers at bay, but this will be something to watch for. Friday into the weekend, the aforementioned low looks to be over southern California by Saturday, with ridging setting up over the PacNW. The forecast continues to trend dry for most of Saturday, with chances for precipitation potentially arriving as early as late Saturday night for areas in the far North Bay. Should the clusters pan out, high pressure meanders eastward as a disturbance advances towards the PacNW Sunday into Monday. Chances for rain have bumped up with the latest forecast package, to about 30-40% for the North Bay region and the San Francisco peninsula coast. Interior areas, like South and East Bay are closer to the 30-35% range and for the Central Coast chances are lower about 15-35%. What does that mean? Regardless of rain chances, expect cooler conditions to prevail with the return of onshore winds, and some cloud cover. Rainfall amounts at this time remain light, with perhaps some areas seeing vicinity showers on Sunday. && .AVIATION... (00Z TAFS) Issued at 341 PM PST Mon Feb 2 2026 Clear skies with VFR conditions forecast this evening. Some tempo fog possible for KSTS/KAPC after 08z with easterly winds possibly bring some tule fog formation into the region otherwise expect mostly clear skies Tuesday morning through Tuesday afternoon with light winds. Vicinity of SFO...Clear skies with light winds forecast the next 24 hours. SFO Bridge Approach...Similar to SFO Monterey Bay Terminals...VFR conditions, some locally gusty southeast winds Salinas Valley night and early morning hours. && .MARINE... (Today through Saturday) Issued at 815 AM PST Mon Feb 2 2026 Hazardous conditions will continue today for the inner waters and outer waters due to rough seas and fresh to strong northerly breezes. Conditions improve tomorrow as moderate seas and a gentle northeasterly breeze prevails through Thursday. By Friday, seas build to become rough, and northwesterly breezes increase to become moderate once again. && .BEACHES... Issued at 257 AM PST Mon Feb 2 2026 Hazardous beach conditions will continue through this evening at Pacific Coast beaches. Long period westerly swell will bring an increased risk for sneaker waves and strong rip currents with breaking waves of 14 to 19 feet. Remember: stay off of jetties, piers, rocks, and other waterside infrastructure, remain out of the water, and never turn your back on the ocean! && .MTR WATCHES/WARNINGS/ADVISORIES... CA...Beach Hazards Statement until 9 PM PST this evening for CAZ006- 505-509-529-530. PZ...Small Craft Advisory until 9 PM PST this evening for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...KR LONG TERM....KR AVIATION...RW 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

484 FXUS66 KOTX 022259 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 259 PM PST Mon Feb 2 2026 .KEY MESSAGES... - Dry and mild Tuesday through Friday. - Wetter weekend expected with incoming front late Saturday && .SYNOPSIS... Tuesday will see return of upper level ridge over the Pacific Northwest. The forecast then trends drier again. Temperatures will remain mild and above normal. Cold front over weekend will bring precip and breezy winds. && .DISCUSSION... Tonight: A shortwave will continue to push through Eastern Washington and North Idaho during the evening. Main concern will be light rain or drizzle. Overnight lows will dip into the upper 20s and low 30s. Early morning commutes could be impacted with icy patches as residual moisture freezes. Fog will again be concern with a saturated boundary layer and the cooling temperatures. Tuesday through Friday: A high pressure center will slowly move through Northern California. It will support another round of ridging over the Pacific Northwest. Lowlands will be under stratus and fog are expected to continue with the stable environment. The higher elevations will have a better chance of getting sunshine. Temperatures will be mild with highs in the upper 40s and 50s and lows in the upper 20s and 30s. Saturday and Sunday: By the weekend, models are breaking down the ridge and swinging a cold front through region. Current runs are showing a decent plume of moisture associated with front. It will be a mountain snow, valley rain event as the front does not have good cold air advection. Snow levels are expected to remain around 4000ft. Frontal passage on Sunday is hinting at breezy winds with afternoon gusts near 30 mph possible. Highs will be in the 40s. Lows will continue to be in the upper 20s and 30s. /JDC && .AVIATION... 00Z TAFS: Mid level continues to filter through the region behind the earlier weak wave. VFR condtions expected for the GEG/SFF/COE/PUW/LWS/MWH. Brief periods of MVFR conditions will continue through MVFR with light precip bringing lower vis and ceilings. There is low confidence on these impacting TAF sites. Ceilings and visibility are expected to degrade again overnight into Tuesday morning. The boundary layer is expected to remain saturated and cooler temps are leading to another round of IFR vis/cig for EAT. IFR cig is expected for GEG/SFF/COE/MWH. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Moderate confidence for IFR conditions for Tuesday morning. ----------------------- 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 34 47 34 50 33 51 / 20 0 0 0 0 0 Coeur d`Alene 35 47 35 50 33 51 / 30 0 0 0 0 0 Pullman 37 52 37 53 35 54 / 20 0 0 0 0 0 Lewiston 40 56 38 57 36 55 / 10 0 0 0 0 0 Colville 33 44 33 48 33 50 / 20 0 0 0 0 0 Sandpoint 35 43 35 47 33 47 / 40 0 0 0 0 0 Kellogg 39 48 38 53 37 56 / 40 0 0 0 0 0 Moses Lake 34 49 33 50 33 52 / 0 0 0 0 0 0 Wenatchee 35 44 36 48 35 49 / 10 0 0 0 0 0 Omak 34 44 37 47 35 48 / 10 0 0 0 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...None. ID...None. && $$

047 FXUS66 KPDT 022210 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 210 PM PST Mon Feb 2 2026 .KEY MESSAGES... - Weak warm front Today - High pressure returns Tuesday through Friday - Likely pattern change by the weekend && .DISCUSSION... A weak AR/warm front over western WA was creating warm and moist advection into central WA This Morning with numerous network obs reporting wetting rains (around one tenth of one inch) in the foothills/lower slopes of the WA Cascades. Lesser amounts (0.01 - 0.05) were observed across the Columbia basin and into se WA by early afternoon. With a stagnant pattern of high pressure returning and influencing the boundary layer, expect patchy fog to develop in some of the valleys and basins overnight. The confidence in development any one location however is low, with not a lot of support from the GFS Lamp guidance or HREF ensemble at least for this first night. Still this might be the most significant sensible weather impact over the next several days. Wednesday Night and Thursday Night should be a couple of degrees cooler, compressing the dew point depressions and favoring saturation and thus fog development. The other risk to keep on eye on this week will, be potential for an air stagnation episode. We will definitely (100%) have sub 10 mph transport winds through the week, however the questions is the uncertainty in maintaining low (sub 1500 ft AGL) mixing heights through Thursday afternoon when the NBM brings deeper mixing, if only slightly. The upper ridge will also act to keep the region precipitation free at least through the end of the week. Likely probabilities for precipitation (80-90%) return Saturday across the WA Cascades while still spreading lower end likely values, (55-65%) across the eastern mountains on Saturday Night through Sunday. Ensemble clusters all show this general precipitation pattern and cold air advection by Sunday as the NBM reflects this with decreasing snow level values through the latter half of the weekend. && .AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/... After a brief period of improved conditions this afternoon, the next round of fog will be developing this evening. MVFR to IFR with pockets of LIFR conditions will be possible after 03z for Washington terminals KPSC, KYKM, and KALW. The onset for the next round of fog is favored to be after 12z Friday for Oregon terminals KPDT and KDLS. As fog dissipates after 21z on Friday, building high pressure will bring a return of widespread VFR conditions. Central Oregon terminals (KRDM and KBDN) are expected to remain VFR through the TAF period.Branham/76 && .Preliminary Point Temps/PoPs... PDT 35 50 32 50 / 10 0 0 0 ALW 38 49 36 51 / 20 0 0 0 PSC 33 49 34 49 / 10 0 0 0 YKM 33 49 35 50 / 10 0 0 0 HRI 33 50 34 49 / 10 0 0 0 ELN 33 44 33 45 / 30 0 0 0 RDM 29 58 28 59 / 0 0 0 0 LGD 34 54 35 55 / 10 0 0 0 GCD 32 57 33 58 / 0 0 0 0 DLS 38 52 37 52 / 10 0 0 0 && .PDT WATCHES/WARNINGS/ADVISORIES... WA...None. OR...None. && $$ DISCUSSION...71 AVIATION...76

543 FXUS65 KREV 022046 AFDREV Area Forecast Discussion National Weather Service Reno NV 1246 PM PST Mon Feb 2 2026 .KEY MESSAGES... * High pressure overhead will bring dry conditions, above average afternoon highs,light winds, and valley inversions through this week. * The high pressure may weaken by this weekend with precipitation chances returning by the second week of February, but confidence is low. && .DISCUSSION... Not a whole lot going on in the forecast in the next 5-6 days. high pressure remains overhead this week, keeping western NV and the Sierra dry and relatively warm. High temperatures will hover around 60 for lower NV valleys and around 50-55 for Sierra valleys this week. Winds will remain light and variable this week, with air stagnation and valley inversions noticeable in the mornings and afternoons. So when will we see our next storm? Well, ensembles and even long range deterministic models are showing the possibility of our next (and weak looking) system moving in as early as the 6th or 7th of February. That probability is pretty low right now due to the discrepancies in the track of the low pressure off the coast. However, where confidence is higher, is a couple days later around the 9th of February. Models are in better agreement about a fairly moderate cold front moving through some time around Monday the 9th, if not earlier on Sunday the 8th. We`ll keep an eye on this storm as it gets closer, but just know for now that there could be additional snow for the Sierra coming early next week. -Justin && .AVIATION... VFR conditions and light winds continue through this week. The only exception will be at KTRK where lower CIGS/VIS is possible due to patchy FZFG development between 09-16Z tonight. Haze will linger around KRNO and possibly KTRK and CXP as well in the mornings and early afternoons. -Justin && .REV Watches/Warnings/Advisories... NV...None. CA...None. && $$

549 FXUS66 KSTO 022216 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 216 PM PST Mon Feb 2 2026 For additional details on weather and expected impacts over the next 7 days, please visit weather.gov/sto/briefing. .KEY MESSAGES... - Dry weather with patchy morning fog in the Valley through the week. - Pattern change late weekend and into early next week, with potential for precipitation. && .DISCUSSION... ...Today through Friday... Skies are partly to mostly sunny across the area, with a few hazy spots. Temperatures have warmed into the 70s in the northern Sacramento Valley and 60s elsewhere in the Valley. Areas in the mountains are in the 40s to 50s. Ridge of high pressure will remain in place through the week, with light and variable winds and morning fog. HREF continues to show fog each morning through Friday for areas in the southern Sacramento Valley towards the northern San Joaquin Valley. Around the Sacramento area fog will be patchy, with visibility reductions to a half mile, while areas in the northern San Joaquin Valley sees reductions to a quarter mile or less. This will be a rinse and repeat situation through Friday. Thus, we have issued another Dense Fog Advisory from 6z through 18z for the northern San Joaquin Valley for tonight into tomorrow morning. Besides the fog, conditions will remain dry with low RH values in the teens to 20s for the mountains each afternoon through Friday. Temperatures will continue to be above normal this week, with a slight cooling trend over the weekend. ...Saturday and onward... Dry conditions and seasonal temperatures on Saturday, with a change in the ridging over the southwestern United States come Sunday. Ensembles have started to pick up on a pattern change taking shape end of the weekend and into early next week that would break down the ridge and introduce precipitation chances. At this time, ECMWF and GFS ensembles have hinted at the possibility of widespread precipitation for the region, with a continued active pattern through all of next week. Probabilities at this time for over a quarter of an inch of precipitation are 30-40 percent for the Valley, and over 60 percent for the foothills, mountains, and Shasta county area. Confidence is low at this time on rain/snow amounts, timing, and breakdown of the ridge. && .AVIATION... VFR conditions expected through the evening, with conditions turning IFR to MVFR as visibilities drop. Patchy dense fog around 05-06z for SAC, SMF, MHR, and MCC through 15-16z. Visibility reductions down a half mile at times for those locations. Areas in the northern San Joaquin area will see more widespread dense fog, with visibilities of a quarter mile or less. RDD and RBL will remain VFR through the TAF period. && .STO WATCHES/WARNINGS/ADVISORIES... Dense Fog Advisory from 10 PM this evening to 10 AM PST Tuesday for Northern San Joaquin Valley. && $$

565 FXUS65 KMSO 022106 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 206 PM MST Mon Feb 2 2026 .DISCUSSION... KEY MESSAGES: - Light valley rain and mountain snow this afternoon and evening potentially causing patchy ice on Tuesday morning - Mid week ridge: Warmth and stagnant pattern - Pattern Shift on the Horizon (Feb 8-10): Increased precipitation chances A weak disturbance is still on track to move through the Northern Rockies this afternoon and evening. Snow levels will be hovering around 4500 feet during the passage of the feature bringing up to 2 inches of new snow to the higher terrain and mountain passes, especially Lolo, Lookout and Marias passes. Areas below 4500 feet will experience some light rain and any roads that remain wet by Tuesday morning could develop patchy ice due to cold sub-surface temperatures. A strong ridge of high pressure will build over the Northern Rockies for Wednesday through Saturday. This ridge will produce unseasonably warm temperatures in the region, but the extent of warm air making down to the valley floors is still a little uncertain. Confidence is growing that the valleys of Clearwater County and across northwest MT, will develop low stratus/fog, which will hinder the warming. Even these locations temperatures will be running around 10 degrees above seasonal averages, but not be able to reach their full potential. The remainder of the Northern Rockies have a better but still low probability of experiencing daily record warmth by Thursday/Friday time frame, especially down the Bitterroot valley and the Butte/Anaconda region. The models are still indicating that the ridge should begin to break down during Sunday/Monday of next week. Temperatures should be cooler along with increased chances for precipitation, but the strength of the change is still uncertain. && .AVIATION...A weak disturbance will be moving through the region this afternoon and evening causing scattered showers. Freezing level will be hovering around 4500 feet during this passage limiting the snow to the higher terrain which will be obscured at times. KMSO, KHRF, and KGPI have the best potential for vicinity showers throughout the evening. The showers are anticipated to linger across west central Montana overnight into Tuesday morning, potentially impacting KHRF. Any wet surfaces Tuesday morning could develop ice due to cold sub-surface temperatures. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...None. && $$

420 FXUS65 KBOI 022107 AFDBOI Area Forecast Discussion National Weather Service Boise ID 207 PM MST Mon Feb 2 2026 .SHORT TERM...Tonight through Wednesday night... Upper ridging building into the area will continue to promote stagnant, inversion conditions over the region. This also means dry air with generally light winds, and no sign of precipitation beyond this evening after a weak system ejects eastward. A near-persistence forecast is in store, with high temperatures peaking in the low 50s each day across lower elevation valleys, and falling to near or below the freezing mark each morning. Patchy fog is also possible each morning, especially in the lower Treasure Valley and central Idaho mountain valleys. The strength of the ridge will only increase into Wednesday, with model guidance suggesting 582-585 dm 500 mb heights - close to a record for the date per the SPC sounding climatology. .LONG TERM...Thursday through Monday... High pressure is the name of the game through the end of this week. As has seemed to be the pattern of choice so far this winter, an amplifying ridge over our area and a deepening closed low near the Baja Peninsula will make way for a rex block. This will keep the day to day forecast very similar to each other with valley inversions and stagnant conditions. Valley fog/low stratus will be the the only hazard through the coming week. While temperatures will be above normal area-wide, valley cold pools will help limit lower elevation daytime highs each day. Through sunday, the current forecast carries daytime highs below the NBM 25th percentile. The door will start to open for a more unsettled pattern late this week as the closed low near the Baja Peninsula begins to re-embed into the main flow aloft. At the same time, the trough that has been over the Hudson Bay will begin to propagate east. Deterministic and model ensembles are in good agreement of a longwave trough moving over the western CONUS late this week/early next week. This trough will usher in cooler temperatures increased precipitation chances, and will break up the inversion. && .AVIATION...VFR this afternoon/evening. Patchy freezing fog/low stratus returning overnight in sheltered mtn valleys and in the lower Treasure Valley. MVFR/LIFR and mtn obscuration in fog/low stratus. Surface winds: Variable up to 10 kt. Winds aloft at 10kft MSL: W-NW 10-20 kt. KBOI...VFR with some high clouds this afternoon/evening. A lower stratus deck may develop overnight, but conditions remain VFR. Surface winds: Light and variable, leaning SE after Tue/03z. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...Air Stagnation Advisory until 11 AM MST Friday IDZ012-014-016-033. OR...Air Stagnation Advisory until 11 AM MST /10 AM PST/ Friday ORZ064. && $$ www.weather.gov/Boise Interact with us via social media: www.facebook.com/NWSBoise www.x.com/NWSBoise SHORT TERM...JR LONG TERM....NF AVIATION.....NF

688 FXUS65 KLKN 022041 AFDLKN Area Forecast Discussion National Weather Service Elko NV 1241 PM PST Mon Feb 2 2026 .KEY MESSAGES... Updated at 1223 PM PST Mon Feb 2 2026 * High pressure this week over the Great Basin will threaten several high temperatures records across the area Tuesday through Thursday * Potential for precipitation and gusty winds returns to NV beginning early next week && .DISCUSSION... (This evening through next Sunday) WEATHER PATTERN OVERVIEW: High pressure builds back into the region on Tuesday after an unimpactful dry trough passes through the Great Basin Monday evening. Under the ridge and HPC the trend of unseasonably warm temperatures continues. This will threaten several high temperature records at our area climate sites through Thursday. Friday the ridge begins to egress to the east allowing for a change in the dry, warm weather pattern that has plagued the reason for the better part of a month. A longwave trough will begin to fill the vacated space by Saturday night. A series of shortwaves in the axis of the parent trough will make their way into the Great Basin by Sunday evening. As the longwave axis pushes into the western CONUS the pressure gradient will begin to tighten increasing westerly wind speeds Monday and Tuesday. Moisture availability also returns to the region as the first shortwave on Monday will bring with it a slug of moisture. This will increase precipitation chances mainly across northern NV though model confidence with the system is very low. Temperatures do not drop considerably with this first wave so a valley rain/mountain snow scenario appears most likely at this time. Ensemble clusters Days 6-9 depict at least a temporary reprieve from high pressure over the western half of the CONUS signaling a potentially active weather pattern for mid February in the Great Basin. FORECAST CONFIDENCE & DEVIATIONS: Confidence is high in high pressure keeping temperatures warm enough to threaten many climate sites high temperatures Tuesday through Thursday. A change in the pattern continues to take shape in the long term though confidence is low for many variables including precip chances, precip type, timing, and accumulations thus far. No major edits needed for the grids at this time. && .AVIATION... VFR conditions expected at all sites through the next 24 hours, with winds less than 10KT. && .LKN Watches/Warnings/Advisories... None. && $$ DISCUSSION...99 AVIATION...94