SPC AC 151931
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0131 PM CST Mon Dec 15 2025
Valid 152000Z - 161200Z
...NO THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today or tonight.
...20z Update...
No changes are needed to the current D1 Convective Outlook. See
previous discussion below for more information.
..Thornton.. 12/15/2025
.PREV DISCUSSION... /ISSUED 1003 AM CST Mon Dec 15 2025/
...Synopsis...
Thunderstorm potential will remain low today as strong surface high
pressure and cut-off Gulf moisture results in a dry/stable airmass
across much of the CONUS. A weak shortwave impulse will move over
portions of the Pacific Northwest today/tonight. A few lightning
flashes will be possible offshore, but minimal instability and
generally shallow convection will preclude stronger updrafts through
sufficiently cold temperatures aloft to produce thunderstorms
inland.
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NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0100Z