####018004596#### FXUS66 KPDT 082106 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 206 PM PDT Sat Aug 8 2026 .KEY MESSAGES... 1. Breezy to windy conditions and low RHs Today and Saturday *Red Flag Warning* 2. Dry, warm and breezy conditions will persist through the weekend and beginning of the week 3. Pattern shift mid-week could bring precipitation && .DISCUSSION... Current satellite shows smokey skies over the region this afternoon which will continue through the forecast period. AQAs have been extended through Monday for all counties except Sherman, Gilliam and Morrow with Deschutes. Otherwise,increased southwest to westerly flow will keep the smoke moving east with a bit of reprieve from surface smoke. Not much change to the short term forecast. Models currently show the surface thermal trough exiting the eastern portion of the region leaving mostly westerly flow at the surface. Even with the west flow, hot, dry and breezy conditions are still expected. Temperatures are in the mid to upper 90s across a vast majority of the region with humidity as low a single digits and winds between 10 to 20 mph with areas gusting between 20 to 40 mph (70-90% confidence). Red Flag Warning today through 11 PM for the Lower Columbia Basin of OR & WA, Eastern Columbia River Gorge, Warm Springs Reservation and Kittitas Valley. Winds are expected to remain 10 to 15 mph and gusting between 25 to 35 mph through at least Tuesday with 70-80% of the NBM raw ensembles in agreement. Minimum relative humidity will slowly increase and the area will remain in elevated fire weather concerns but under critical thresholds. Westerly flow will continue through the weekend and beginning of next week with temperatures becoming slightly cooler. In house calculations shows much of the region to still be above seasonal average at 10-20 for today steadily decreasing to near 5 degrees above normal by Monday. Models are coming into slight agreement with a pattern change by mid- week. Models are showing an upper level trough making its way into the region with a Four Corners High set up to the south. This has the potential to bring in some monsoonal moisture as well as some instability. Depending the track of the upper level low will determine just how much the area will see. && .AVIATION /18Z TAFS THROUGH 18Z SUNDAY/... Visibility should be 6 miles or more at all sites as the westerly winds develop with wildland fire smoke dispersing better around the terminals. The strongest winds winds will be around DLS, increasing through the afternoon with local gusts as high as 25-28 knots through the evening. Elsewhere look for largely sub 12kt winds with southeast winds at PSC switching to westerly by early afternoon. && .FIRE WEATHER... Red Flag Warnings in effect through 11 PM for winds and low relative humidities. This is for the Columbia River Basin of OR & WA, Eastern Columbia River Gorge, Warm Springs Reservation and Kittitas Valley for winds 10-20 mph gusting to 20-40 mph with humidity as low as 10-15%. Upper level flow aloft is from the west driving breezy westerly flow at the surface. Breezy conditions are expected to persist through the beginning of the week with west winds 10-15 mph and gusting to near 20-30 mph (70- 80% confidence). Cooler more moist air will make its way across the Cascades Sunday. Humidity will see a slight increase by Sunday and will decrease fire weather concerns from critical to elevated. && .Preliminary Point Temps/PoPs... PDT 56 89 55 88 / 0 0 0 0 ALW 62 90 61 89 / 0 0 0 0 PSC 58 92 58 91 / 0 0 0 0 YKM 59 93 59 92 / 0 0 0 0 HRI 61 91 59 90 / 0 0 0 0 ELN 59 87 57 86 / 0 0 0 0 RDM 47 89 45 88 / 0 0 0 0 LGD 55 91 53 90 / 0 0 0 0 GCD 53 92 52 91 / 0 0 0 0 DLS 61 90 60 89 / 0 0 0 0 && .PDT WATCHES/WARNINGS/ADVISORIES... WA...Red Flag Warning until 11 PM PDT this evening for WAZ690-691. Air Quality Alert until 5 AM PDT Tuesday for WAZ024-026>030- 521>523. OR...Air Quality Alert until noon PDT Monday for ORZ041-044-049-050- 502-503-505>511. Red Flag Warning until 11 PM PDT this evening for ORZ691-701- 703. && $$ DISCUSSION...90 AVIATION...71 FIRE WEATHER...90 ####018007315#### FXUS66 KOTX 082107 AFDOTX Area Forecast Discussion National Weather Service Spokane WA Issued by National Weather Service Seattle WA 207 PM PDT Sat Aug 8 2026 .KEY MESSAGES... - Red Flag Warnings due to breezy westerly winds and low relative humidity remain in effect mainly for the Cascade gaps and Columbia Basin region. - Widespread smoke and haze will continue today; some improvement is expected through Sunday, except in the vicinity of or downwind of ongoing wildfires. - Continued elevated fire weather conditions Sunday for the Cascade gaps due to breezy westerly winds and low relative humidity. && .SYNOPSIS... A ridge of high pressure will flatten today through the weekend as a couple of shortwaves pass over the region. This will promote elevated to critical fire weather conditions, with Red Flag Warnings remaining in effect for much of the region. Widespread smoke and haze will continue throughout the area today, and while westerly winds are expected to bring some improvement to the region this afternoon through the later half of the weekend, wildfire smoke will continue to impact the region, especially in the vicinity of or downwind of regional wildfires. A quasi- zonal upper-level pattern will continue into next week, keeping periods of breezy westerly winds in place, but will bring some slightly cooler temperatures to the region. && .DISCUSSION... Rest of Today and Sunday: Widespread Red Flag conditions continue for much of the Inland Northwest today into early Sunday as a shortwave trough continues to race through the region. Overall, expect west- southwest winds around 10-20 with gusts around 18-25 mph in most locations under the Red Flag Warning. The one exception will be the Cascade gaps where wind gusts in the evening will be higher, generally around 25-40 mph. Fires in Chelan and Okanogan County will be well ventilated with westerly flow aloft and will have favorable weather conditions for significant growth throughout the afternoon and evening hours. The smoke output from these fires may knock temperatures down a few degrees in eastern WA and north ID and locations close to the fire, reducing fire risk slightly. Needless to say, avoid any activities that may cause sparks as fuels are near/at record dryness levels for this time of year. HRRR near surface smoke output is still showing impressive concentrations this evening and overnight hours downwind in the eastern third of WA and north Idaho. If this were to occur, air quality will continue to degrade. Another push of Cascade gap winds will occur Sunday afternoon and evening as another shortwave traverses the region, leading to once again, elevated to locally critical fire weather conditions in the Wenatchee area and Waterville Plateau with gusts around 20-35 mph and relative humidity around 18-25 percent. The wildcard is smoke reducing temperatures in those areas, which would help with reducing fire risk. Monday through Saturday: Zonal flow will continue through Tuesday, bringing near normal temperatures and breezy winds to the Cascade gaps in the evenings. There are some changes on Wednesday as our first chance of precipitation in a few weeks returns near the Canadian border as a broad shortwave trough approaches from the north. There continues to remain a 10-20% chance of showers (with very little precipitation expected) as this system moves through. There is a small chance (10-20%) of thunderstorms in northeast WA and north ID as this system slowly departs Thursday. Again, confidence is low in this pattern but it is worth discussing since it'll be the first precip chances in a while. Ensembles are hinting towards above normal temperatures returning late next week but with troughing setting up off the coast this raises concerns for thunderstorms. /DB-Mazurkiewicz && .AVIATION... 18Z TAFs: Visibilities and ceilings due to smoke have degraded this afternoon - largely with MVFR/IFR conditions across the area. Locations in and around KMWH and KGEG are seeing visibilites around 2-4 SM, while other terminal locations are seeing generally 6 SM. W/NW winds will increase across the region once again this afternoon with gusts up to 20-25 kt possible across the Basin and up to 25-30 kt at KEAT and along the gaps in the Cascades. Winds will peak this evening, easing late tonight. Localized lowered visibilites are likely throughout the evening. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence in smoke and haze continuing to impact the area terminals today, but low confidence in extent of reduced vis/cigs. Moderate confidence in the winds. ----------------------- 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 57 88 57 87 55 87 / 0 0 0 0 0 0 Coeur d'Alene 55 87 55 85 53 86 / 0 0 0 0 0 0 Pullman 50 84 49 83 48 83 / 0 0 0 0 0 0 Lewiston 61 92 59 91 60 91 / 0 0 0 0 0 0 Colville 49 89 49 88 47 88 / 0 0 0 0 0 0 Sandpoint 52 85 52 84 50 85 / 0 0 0 0 0 0 Kellogg 54 84 53 82 53 82 / 0 0 0 0 0 0 Moses Lake 56 90 56 89 55 89 / 0 0 0 0 0 0 Wenatchee 64 91 64 90 62 89 / 0 0 0 0 0 0 Omak 58 91 59 91 58 90 / 0 0 0 0 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...Red Flag Warning until 11 PM PDT this evening for Colville Reservation (Zone 702)-East Portion of North Cascades National Park/Lake Chelan National Recreation Area (Zone 697)-East Washington Central Cascades (Zone 696)-East Washington North Cascades (Zone 698)-Eastern Columbia Basin -Palouse -Spokane Area (Zone 708)-Foothills of Central Washington Cascades (Zone 705)-Foothills of Northeast Washington (Zone 701)-Lower Palouse -Snake River (Zone 709)-Methow Valley (Zone 704)-Okanogan Valley (Zone 703)-Waterville Plateau (Zone 706)-Western Columbia Basin (Zone 707). Air Quality Alert until 11 AM PDT Wednesday for Central Chelan County-Lower Garfield and Asotin Counties-Moses Lake Area- Northeast Blue Mountains-Northeast Mountains-Okanogan Highlands-Okanogan Valley-Spokane Area-Upper Columbia Basin-Washington Palouse-Waterville Plateau-Wenatchee Area-Western Chelan County-Western Okanogan County. ID...Air Quality Alert until 11 AM PDT Sunday for Coeur d'Alene Area-Northern Panhandle. Air Quality Alert until 3 PM PDT Monday for Central Panhandle Mountains-Idaho Palouse-Lewis and Southern Nez Perce Counties-Lewiston Area. && $$ ####018008363#### FXUS66 KEKA 082107 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 207 PM PDT Sat Aug 8 2026 .KEY MESSAGES... *Moderate to major heat risk continues through the weekend for much of the interior peaking today in most areas. *Localized critical fire weather possible this weekend due to stronger afternoon valley winds and low relative humidity. *Coastal stratus to continue for much of the North Coast today and tonight with continued chances for afternoon clearing. *Temperatures diminish slightly next week, yet most inland areas remain in the upper 90s to around 100 through mid-week. && .SYNOPSIS...Persistent high pressure aloft remains through the weekend. Inland areas continue to see above normal temperatures while the coast remains under marine stratus. Temperatures are expected to gradually start cooling closer to normal next week. An upper level trough off the coast may bring monsoon moisture and the slight potential for thunderstorms late next week or next weekend. && .DISCUSSION...A steady ridge of high pressure remains entrenched over the west coast leading to warm to VERY hot temperatures for the inland areas. Most inland valleys can expect high temperatures above triple digits today and close to, if not slightly above 100F tomorrow. The coast continues to offer some relief from this heat. Offshore stratus is blanketing much of the California coast, yet satellite imagery shows mixing making its way from the OR boarder southward. However, slightly above average SSTs and offshore flow will contribute to limited development of prolonged overcast conditions through the rest of the weekend. Warming continues across the interior with moderate to localized areas of major HeatRisk indicated. The heat is expected to peak on today, particularly over Lake County, where conditions were on the edge of warranting an excessive heat warning instead of only an advisory. Regardless, this persistent heat will be dangerous for anyone working outside and everyone in the interior portions of all of Northern California should be drinking plenty of fluids and taking breaks in the shade to avoid heat stroke or heat exhaustion. The aforementioned interior heating will tighten the surface pressure gradient over NW CA forcing stronger onshore (NW) sea breezes each afternoon and evening. With very dry conditions across the interior this will result in increase fire weather concerns. For more details, see the fire weather section below. The upper level ridge that has settled over the area should finally weaken and migrate eastward through early next week. A secondary high pressure system is forecasted to set up over the Pacific which will lead to weak troughing settling over the west coast. This should allow temperatures to cool several degrees back to around normal for this time of year and could lead to increased likelihood of afternoon clearing of coastal stratus. This may also start to bring the threat for inland thunderstorms late next week or next weekend with there is enough moisture associated with this evolving synoptic system. && .AVIATION...18Z UPDATE...Coastal stratus remains across the entire western seaboard today. Expect IFR/LIFR conditions for most of the day along coastal terminals. Slight clearing is possible, yet not expected from 19Z-00Z, better changes are for areas near large river deltas compared to areas near steeper terrain. If it does clear, overcast skies will return later this afternoon between 02-04Z for most of the North Coast before developing to fog late this evening. Winds will build to 10-15kts or so and will be mostly northerly for most of the day along the coast. Wind directions this will be dictated by coastal eddies forming and migrating along the coastline. Inland areas are expected to remain VFR with gusty afternoon winds developing during the peak heating of the day. Upslope winds will form through the morning and midday before NW winds dominate the interior areas of NW CA. Anomalously hot temperatures for the inland areas could lead to density altitude issues this afternoon as well, be aware. && .MARINE...Significant wave heights have been building through the morning as northerly winds build steadily. Observations show gusts up to 15-20kts which should increase through the afternoon, especially further away from the coastline. Waves in the outer waters are likely larger and steeper than the nearshore buoys are recording due to the strongest winds expected downwind of Cape Mendocino and Point St. George, where gale force gusts are likely (>50% probability). These forecasted winds called for a Gale Warning for the outer waters through the remainder of the weekend, and likely longer into the middle of next week if long range weather models hold fast. The inner waters are more likely to see moderate to fresh breezes with steep waves due to propagation from the fetch areas in the outer waters. The very steep northerly waves have called for a small craft advisory for the inner waters this weekend. Plan your seafaring outings accordingly and always feel free to reach out for any addition information regarding the marine forecast for NW CA. && .FIRE WEATHER...Stronger afternoon winds are expected to develop for valleys this afternoon. Winds are already following the channeled terrain and should increase with gusts up to 20 or even 25mph possible through the heat of the afternoon. These breezy conditions are expected to expand to localized areas for several hours this afternoon bringing critical fire weather Trinity, northern and eastern Mendocino, and Lake Counties. While the duration of the winds and low RH values are shorter than needed for Red Flag status, it is important to remember that even a single spark could start a wildfire in these conditions. Tonight, higher elevations at or above 2,500ft can expect continued low RH recoveries at or below 20% as a thermal belt develops at midslopes. Sunday afternoon, breezy winds are expected again for several hours, yet the RH is expected to be slightly higher than today. Next week, temperatures are expected to slight cool as the upper level ridge moves eastward. The new large scale weather set up looks to have the potential for some dry thunderstorms next Friday or Saturday. There is still a lot of uncertainty on this, (moisture, lift, stability, etc.) but it definitely will need to be watched and accounted for through the coming work week. && .COASTAL FLOODING...Sea levels continue to run approximately 0.8 ft above the predicted tide level in Humboldt Bay. Tides will become more amplified early next week following the normal lunar cycle. The predicted tide at the North Spit is 7.95 ft MLLW at 10:21 pm on Monday the 10th and then 7.99 ft MLLW at 11:17 pm on Tuesday the 11th. If the tide continues to run at around 0.8 ft above predicted, this could result in minor coastal flooding around Humboldt Bay with minor impacts in King Salmon and possibly a few other locations around the bay. && .EKA WATCHES/WARNINGS/ADVISORIES... CA... Heat Advisory until 11 PM PDT this evening for CAZ105-106. Heat Advisory until 10 PM PDT Sunday for CAZ108-110>114- 116>120. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 10 PM PDT Sunday for PZZ450-455. Small Craft Advisory until 3 PM PDT this afternoon for PZZ470-475. Gale Warning until 3 AM PDT Tuesday for PZZ470. Gale Warning until 10 AM PDT Monday 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