Area Forecast Discussion
Issued by NWS Spokane, WA
Issued by NWS Spokane, WA
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347 FXUS66 KOTX 181733 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 1033 AM PDT Sat May 18 2024 .SYNOPSIS... Cooler and unsettled weather will continue through the weekend. This morning will be quite chilly, with the potential for frost in the sheltered valleys of north Idaho, northeast and north central Washington. A wetter low pressure system is expected on Wednesday and will keep temperatures below normal. && .DISCUSSION... Updates: KOTX 12Z sounding still showing what would be considered a conditionally unstable airmass overhead with a generally low tropopause at near 280mb, as such with a vort max well resolved in the satellite imagery progged to drop down to the southeast today the forecast this afternoon and on tonight consisting of showers with some mention of weak short lived pulse thunderstorms remains more or less in place. /Pelatti && .AVIATION... 12Z TAFS: Conditionally unstable airmass with a disturbance dropping down northwest to southeast across the aviation area will allow for some mention of showers and possible weak short lived pulse thunderstorms. Still for the most part VFR conditions are expected. /Pelatti FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Of course the disturbance dropping down could very well take a different trajectory through and miss some of the TAF sites that have mention of potential precip in them. In addition some stratus could form tonight into Monday morning due to any resulting rainfall today and tonight. /Pelatti ----------------------- 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 62 40 60 39 69 44 / 20 40 50 20 0 0 Coeur d`Alene 60 39 56 39 66 42 / 30 40 60 20 10 0 Pullman 59 36 57 38 63 42 / 10 30 30 10 10 0 Lewiston 69 43 64 45 71 48 / 0 20 20 10 10 0 Colville 61 33 63 34 71 38 / 70 70 70 20 10 10 Sandpoint 58 36 54 38 64 41 / 70 60 80 20 30 10 Kellogg 56 40 52 41 61 43 / 40 50 70 20 40 10 Moses Lake 67 39 69 42 76 46 / 10 10 10 0 0 0 Wenatchee 63 42 67 44 73 50 / 10 10 10 0 0 0 Omak 66 39 68 41 76 47 / 40 30 20 10 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... ID...None. WA...None. && $$