Area Forecast Discussion
Issued by NWS Spokane, WA
Issued by NWS Spokane, WA
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211 FXUS66 KOTX 290456 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 956 PM PDT Tue May 28 2024 .SYNOPSIS... A cool and showery day will occur on Wednesday, followed be areas of frost Wednesday night into Thursday morning. Drier weather is expected Thursday and Friday. A chance of mountain showers returns on Saturday following the potential for more widespread rain early next week. && .DISCUSSION... Evening update: Cooler and drier air is pouring into Central and Eastern Washington this evening with dew points falling into the mid 30s to low 40s. This in response to the cold and dry advection behind a cold front. This is resulting in a stabilizing trend ending the chance for thunderstorms for much of the region. A couple areas of elevated instability linger over far NE Washington (north and east of Colville) and the north Idaho Panhandle as well as down around the Lewiston area and Camas Prairie into the Central Panhandle Mountains. The chance for showers and a few thunderstorms will linger over these areas this evening with drying overnight. With the surface cold front through this areas the threat of strong thunderstorms has ended. JW && .AVIATION... 06Z TAFS: Drier air behind a cold front will promote VFR conditions into Wednesday. Winds will also be breezy due to cold air advection behind the cold front with west winds gusting to 20-25 kts with locally stronger gusts. Some of these enhanced gusts will occur Wednesday afternoon as showers increase across the region. The CAM`s models are in good agreement of locally enhanced gusts as high as 30-35 kts, but location and timing carry low confidence. Isolated thunderstorms are expected as well, with the best chances over Northeast Washington into the Idaho Panhandle. There will be enough instability for even a thunderstorm chances down into the Spokane/Coeur d`Alene area and the Palouse, but confidence is too low to include in the TAF forecast. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence in VFR conditions through the TAF period, except for localized MVFR visibilities under heavier showers or thunderstorms Wednesday afternoon and early evening. 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 43 62 38 65 41 70 / 0 20 10 0 0 0 Coeur d`Alene 43 59 37 61 40 69 / 10 40 20 0 0 0 Pullman 42 57 37 61 40 67 / 30 20 20 0 0 0 Lewiston 50 66 44 69 46 77 / 40 10 10 0 0 0 Colville 37 59 31 65 35 71 / 10 70 10 0 0 0 Sandpoint 43 57 36 61 39 67 / 30 70 40 10 0 0 Kellogg 45 55 38 59 42 66 / 40 50 50 0 0 0 Moses Lake 42 67 38 72 41 75 / 0 10 0 0 0 0 Wenatchee 44 64 43 69 45 74 / 0 10 0 0 0 0 Omak 40 66 37 69 40 75 / 0 20 0 0 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... ID...None. WA...None. && $$