Area Forecast Discussion
Issued by NWS Spokane, WA
Issued by NWS Spokane, WA
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903 FXUS66 KOTX 290209 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 709 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... 00Z TAFS: Main aviation concerns are shower/thunderstorm activity this evening, Cascade gap winds, and shower activity tomorrow. KGEG-KPUW-KSFF-KCOE will experience VCSH until 3z or so before moving out of the area. KLWS still has a 30% chance of thunderstorms before 3z. Cascade gap winds will still be breezy through the evening an overnight hours. Low stratus looks of very minor concern with a drier airmass behind the front. Shower activity will spark again tomorrow afternoon around 19-21z mostly north of I-90 and will be weaker. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Low confidence for a shower or thunderstorm hitting the TAF sites this evening. ----------------------- 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. && $$