SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0124 AM CST Wed Jan 13 2021 Valid 151200Z - 161200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected across the U.S. mainland Friday. ...Discussion... A closed synoptic upper low will be centered across the Midwest early Friday. This feature will move slowly east through the OH and TN Valleys during the day. The accompanying occluded surface low will weaken across the Great Lakes, while secondary cyclogenesis is forecast near the Mid Atlantic coast late in the period. A front will initially extend from the occluded low over the Great Lakes, southeast through the southern Appalachians into the Gulf Coast States. The front will continue east and off the Atlantic seaboard by late Friday night. Bands of precipitation will likely occur in vicinity of this boundary. However, very limited moisture return and meager to no instability should preclude thunderstorm development. ..Dial.. 01/13/2021
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