Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
0620 AM CST Fri Dec 26 2025

Valid 261300Z - 271200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Severe thunderstorms are not forecast across the contiguous United
States through tonight.

...Synopsis...
Water-vapor imagery this morning shows a large-scale upper trough
over the Pacific Northwest coast and eastern Pacific.  This
positive-tilt trough will shift eastward to the northern Rockies and
Sierra Nevada by early Saturday morning.  Concurrently, a flattened
mid to upper-level ridge over the Great Plains will move into the MS
Valley.  Plume of subtropical moisture over the eastern Pacific will
continue to advect northeast into portions of the Interior West. 
Showers and widely spaced, occasional thunderstorms are likely today
across CA into the Great Basin and northern Rockies.  Scant
instability will likely preclude strong thunderstorm development
with this activity.  Farther east, a few thunderstorms are possible
from the Great Lakes east-southeast into the northern Mid-Atlantic
states in advance of a mid-level shortwave trough forecast to move
east today.

..Smith/Weinman.. 12/26/2025