FXUS66 KOTX 250528 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 1028 PM PDT Fri Apr 24 2026 .KEY MESSAGES... - Chilly overnight temperatures with sensitive vegetation susceptible to frost and freeze damage through Saturday morning. && .SYNOPSIS... Aside from mountain showers, dry conditions and partly cloudy skies will prevail through the weekend. Overnight lows will trend colder with temperatures dropping below freezing through Saturday night for much of the region. Temperatures start to slowly moderate into next week. A passing weather system early next week will bring a better chance for scattered showers across much of the region Monday. && .DISCUSSION... This afternoon through Saturday: The Inland NW will remain in a dry northerly flow on the backside of the broad central Canada low. This will provide only limited clouds and limited shower chances. A field of cumulus clouds over the Idaho Panhandle into southeast WA are expected to dissipate with the loss of heating, increasing again Saturday afternoon. Shower chances this evening will be limited to primarily the lower portions of Shoshone County, though I cannot rule out a sprinkle near the other mountains. Other shower chances pop-up again across the ID Panhandle mountains Saturday afternoon. The dry northerly flow is very pronounced in the breezy northerly flow down through the Okanogan Valley into the western basin, especially looking at the lower level WV channel on satellite. Relative humidity values are in the teens to lower 20s in much of the area, except southeast WA into the ID Panhandle. The winds over the Okanogan Valley southward will subside through the evening, though they will not go calm. Lows tonight under the dry atmosphere and declining winds will are expected to drop to 20s to mid-30s. Freeze warnings are in place for the Lewiston-Clarkston Valley and Moses Lake zone tonight into early Saturday morning and a frost advisory is in place for the Wenatchee area which could see lows near the lower to mid-30s. For Saturday night to Sunday AM, lows are not projected to be as cold but we will have to keep an eye on it. Highs will be in the 50s to lower 60s, with lower 60s in the deeper basin. Sunday to Monday: A little more moisture comes back, with PWATs rising back to around 100% of normal, while a shortwave pivots around the backside of the Central Canada low and moves into our region. This will bring increasing rain and snow shower chances. First on Sunday chances come to the Cascades and ID Panhandle and NE WA mountains, spilling out toward toward the central/southern WA/ID border. A small risk for t-storms will be found near the NE mountains Sunday PM. The overall shower risk wanes some at night. Then Monday the potential increases again, expanding to more over eastern WA this time. There is also some increases CAPE and lapse rates for Monday afternoon, bringing a chance for t-storms over southeast WA and the central and southern ID Panhandle and a lingering risk over the NE mountains. Overall precipitation amounts look light and any snow that might fall is expected to be of little to no impact. Highs will be in the 50s and 60s and lows will be in the 30s to mid-40s. Tuesday to Friday: The Inland NW will remain in northerly flow but starts to transition to a milder pattern Central Canada low starts to move out. However the details of how that atmosphere looks and how the next shortwave approaches has poorer agreement in the ensembles toward the middle to latter part of the next week. Shower chances linger around the mountains Tuesday and again Wednesday, before drier weather Thursday and Friday. Temperatures warm into the 60s and lower 70s by Wednesday and the upper 60s and 70s Thursday and Friday. /Solveig &&.AVIATION... 06Z TAFS: A dry northerly flow will continue to promote VFR conditions across the region into Saturday. Continued cool air aloft will promote an unstable atmosphere during the afternoon and early evening hours, but lack of moisture will result in mainly flat to moderate cumulus with a few afternoon showers over the mountainous terrain of the Idaho Panhandle. The northerly flow will promote breezy north winds down the Okanogan Valley (KOMK) with gusts up to 15-20 kts primarily for the morning until early afternoon hours. Otherwise, light winds across the region. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence for VFR conditions. /SVH ----------------------- 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 30 56 33 57 36 59 / 0 0 0 10 10 20 Coeur d'Alene 28 54 33 55 36 56 / 0 10 0 20 10 20 Pullman 26 54 30 55 35 56 / 0 10 0 10 10 30 Lewiston 32 58 36 59 38 60 / 0 0 0 10 0 20 Colville 25 59 33 60 32 62 / 0 10 0 20 10 10 Sandpoint 28 53 31 52 33 54 / 0 10 10 30 20 20 Kellogg 28 52 31 53 34 55 / 0 20 0 40 20 40 Moses Lake 30 61 34 64 40 66 / 0 0 0 0 0 0 Wenatchee 36 61 38 62 42 64 / 0 0 0 10 10 0 Omak 32 61 34 62 38 65 / 0 0 0 10 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... WA...Freeze Warning from midnight tonight to 8 AM PDT Saturday for Lower Garfield and Asotin Counties-Moses Lake Area. Frost Advisory from midnight tonight to 8 AM PDT Saturday for Wenatchee Area. ID...Freeze Warning from midnight tonight to 8 AM PDT Saturday for Lewiston Area. && $$