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SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0618 PM CST Fri Dec 19 2025
Valid 200100Z - 201200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected through tonight.
...Synopsis...
A mid-level trough and accompanying surface trough are ejecting into
the Atlantic, with any available scant buoyancy being displaced east
of the CONUS. As such, any thunderstorms and accompanying
thunderstorm wind threat should be ending soon, though damaging
gusts from gradient flow (non-thunderstorm processes) may persist
through the evening hours. Elsewhere across the CONUS, a zonal upper
pattern will be in place, with a few embedded impulses poised to
traverse the northwestern quadrant of the CONUS over the next few
hours. Pockets of cooler temperatures aloft with these impulses may
support just enough buoyancy (however scant) for a few lightning
flashes across portions of northwestern Wyoming and the Pacific
Northwest coastline through early tonight.
..Squitieri.. 12/20/2025
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