Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1113 PM CST Sun Jan 22 2017 Valid 231200Z - 241200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few thunderstorms are possible today across the Middle Atlantic region, while isolated storms may also develop from California into the Four Corners area. ...Mid Atlantic area... Upper low centered over western GA will move northeast today, reaching eastern NC this afternoon. Primary zone of deeper ascent will move from NC into the Middle Atlantic. This area will reside north of an occluded front and within divergent upper jet exit region where colder temperatures aloft accompanying the upper low circulation will promote weak instability and a few thunderstorms. ...California through the Four Corners region... A large area of steeper lapse rates associated with cold air aloft accompanying a synoptic upper trough will spread inland through CA and eastward into a portion of the Great Basin. This will contribute to weak instability across the region. Several pockets of ascent accompanying a series of vorticity maxima rotating through the upper low circulation will contribute to the development of showers and a few thunderstorms. Thunderstorm potential appears higher over CA and especially near the coast where slightly greater instability will exist. ..Dial.. 01/23/2017Read more
from SPC Forecast Products http://ift.tt/s7Jkvo
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