SPC 0100Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
0627 PM CST Mon Dec 28 2020

Valid 290100Z - 291200Z


Severe thunderstorms are not expected tonight.

...01z Update...

Only minor changes have been made to the 20z outlook, namely to
lower thunder probabilities north of LAX.

Early-evening water vapor imagery depicts a well-defined upper low
drifting southeast along the southern CA coast. Large-scale forcing
for ascent will gradually spread inland along with more favorable
lapse rates that have supported isolated thunderstorm activity. As
this feature approaches the lower CO River Valley, the threat for
lightning should wane over coastal southern CA.

Downstream, weak elevated convection may develop across the central
Plains later tonight. A few flashes of lightning can not be ruled
out, with the primary threat being delayed until later in the day2

..Darrow.. 12/29/2020

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