SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0645 AM CST Sun Dec 27 2020 Valid 271300Z - 281200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms are possible overnight along the central California coast. ...Central CA coast overnight... A midlevel shortwave trough near 36 N and 132 W will progress eastward toward the central CA coast by 12z Monday. Cooling midlevel temperatures and steepening low-midlevel lapse rates will accompany this trough as it approaches the coast, in the zone of ascent within the left-exit region of the mid-upper jet. Satellite imagery and lightning detection data have revealed a few thunderstorms with the trough over the eastern Pacific, and the threat for isolated thunderstorms is expected to increase along the central CA coast tonight, mainly after about 03-06z. ..Thompson.. 12/27/2020
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