SPC 1200Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1056 PM CST Mon Dec 21 2020

Valid 221200Z - 231200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms are not expected through Wednesday morning.

...Synopsis and Discussion...
An upper trough is forecast to deepen significantly as it develops
south and east across the Rockies and into the Plains. Low pressure
will deepen over the Dakotas during the day, traveling east across
MN overnight. A cold front will move from the northern High Plains
at 00Z into central Plains by 12Z Wednesday.

Although lift will be present in association with this trough, high
pressure over the Southeast will limit moisture return across the
Plains. While 50s F dewpoints will stream north into OK and KS and
interact with the cold front overnight, forecast soundings indicate
little if any instability for thunderstorms.

..Jewell.. 12/22/2020

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