SPC 0830Z Day 3 Outlook

Day 3 Outlook Image

Day 3 Convective Outlook  
NWS Storm Prediction Center Norman OK
0102 AM CST Sat Dec 05 2020

Valid 071200Z - 081200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Isolated thunderstorms are expected across the southern Florida
peninsula on Monday.

...Synopsis...
A mean upper trough will persist across the eastern U.S. on Monday
while an upper ridge builds across the western half of the country.
Within the western upper ridge, an upper low over southern CA will
become cut-off and shift southwest over the Pacific offshore from
southern CA/northern Baja. At the surface, high pressure will
envelop much of the CONUS, bringing dry and stable conditions with
little chance of thunderstorm activity. The exception will be across
the southern Florida peninsula, mainly during the morning hours. A
weak surface low offshore the southwest FL coast will quickly shift
east/northeast by early afternoon, and a cold front will sag
southward. Weak instability and poor lapse rates should limit severe
potential, though strong southwesterly deep layer flow will persist
through at least midday. This could result in a briefly organized
storm or two, capable of gusty winds.

..Leitman.. 12/05/2020

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