SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1212 AM CDT Fri Oct 02 2020 Valid 021200Z - 031200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected on Friday. ...Discussion... The large-scale flow field aloft over the U.S. will remain largely unchanged today, as a highly amplified pattern -- featuring a western ridge and eastern trough -- remains in place across North America. At the surface, a reinforcing cold front, extending from Maine south-southwestward along the Atlantic Coast to the eastern Gulf of Mexico, will continue moving slowly eastward/southeastward. Cool high pressure in its wake will cover the rest of the eastern half of the country. Over the Plains, weak/broad surface low pressure is expected, as short-wave troughing aloft digs southeastward out of Canada on the western fringe of the larger-scale trough. In the West, an ill-defined/weak surface pattern is expected, beneath stout upper ridging. With most of the country to remain cool/stable, thunderstorms are generally not expected. Two exceptions will be over the Lower Great Lakes region, where showers and sporadic afternoon lightning strikes will be possible, and over south Florida, as the secondary cold front advances slowly southward with time through the period. ..Goss/Squitieri.. 10/02/2020
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