SPC 0700Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1215 AM CST Sun Dec 20 2020 Valid 211200Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected on Monday. ...Synopsis... A pair of shortwave troughs are expected to move within the broadly cyclonic flow over the eastern CONUS. Lead shortwave trough is forecast to begin the period over the central Carolinas before quickly moving offshore. The second shortwave will likely begin the period over the Upper Midwest before continuing southeastward across the Upper Great Lakes, OH Valley, and Mid-Atlantic States. A strong shortwave is also expected to move into the Pacific Northwest/northern CA early Tuesday morning. Preceding frontal passage and the dry continental air mass in its wake will result in stable conditions across the central and eastern CONUS. Cold and stable conditions are expected west of the Rockies as well. ..Mosier.. 12/20/2020
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