Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0123 PM CST Sun Dec 21 2025
Valid 212000Z - 221200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today.
...20z Update...
No changes are needed to the D1 Convective Outlook. See previous
discussion below.
..Thornton.. 12/21/2025
.PREV DISCUSSION... /ISSUED 0957 AM CST Sun Dec 21 2025/
Thunderstorm potential will be limited across the CONUS. Strong
onshore flow and cold temperatures aloft will pose a risk of a few
lightning flashes today and tonight over portions of the WA/OR coast
and parts of northern CA. Low-level warm advection and an
approaching cold front could result in isolated thunderstorms this
afternoon over parts of southern LA/MS, and late tonight over south
TX. No severe storms are anticipated today.
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