SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1111 AM CST Tue Dec 08 2020 Valid 091200Z - 101200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected on Wednesday. ...Synopsis... Upper troughing extending throughout the Intermountain West early Wednesday is forecast to progress eastward throughout the day, ending the period over the MS Valley. To the west of the upper ridge, an upper low off the southern CA/Baja coast early in the period is expected to gradually move eastward/east-northeastward into the Lower CO River Valley. At the same time, a shortwave trough entering the Pacific Northwest/southern British Columbia will move eastward through Alberta and the northern Rockies. At the surface, high pressure will promote dry low-level trajectories and resulting dry and stable conditions. Showers are anticipated as mid-level moisture increases across AZ late Wednesday night/early Thursday morning. However, the lack of sufficient instability should preclude thunderstorms. ..Mosier.. 12/08/2020
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