SPC 1200Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1212 AM CDT Fri Oct 02 2020

Valid 021200Z - 031200Z


Severe thunderstorms are not expected on Friday.

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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