291 
ACUS03 KWNS 191924
SWODY3
SPC AC 191923

Day 3 Convective Outlook  
NWS Storm Prediction Center Norman OK
0123 PM CST Fri Dec 19 2025

Valid 211200Z - 221200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Minimal thunderstorm activity is expected on Sunday across the USA.

...Synopsis...
A broad upper trough will move across the Northeast on Sunday, with
generally zonal flow extending to the west. At the surface, high
pressure will move eastward across the Midwest during day, and
toward the Mid Atlantic by Monday morning. As result of the dry air
mass, stable conditions will be prevalent over much of the central
and eastern CONUS.

To the west, a weak midlevel feature will approach the Pacific
Northwest with cooling aloft as a cold front approaches the WA/OR
Coast around 00Z. Little if any instability is forecast to be
present except primarily over the ocean. Farther south, southwest
flow with midlevel moisture and lift will be prevalent across much
of northern CA, and weak elevated instability is forecast by some of
the models. However, overall thunderstorm/lightning coverage will
likely be quite low.

..Jewell.. 12/19/2025

$$