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Archives for the SPC Convective Outlook are updated daily (approximately) with a live map at the beginning of each article. Follow the link at the end of the article to check for current updates on the NOAA/NWS Storm Prediction Center website. Also, see Archives for Chicago's hourly weather data on CARDINAL NEWS Magazine.

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Monday, December 15, 2025

SPC Dec 16, 2025 0100 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 0100Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0656 PM CST Mon Dec 15 2025

Valid 160100Z - 161200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms are not forecast tonight.

...Pacific Northwest...
Thunderstorms earlier this afternoon over southwest OR have fully
decayed in the past couple hours. A lone storm or two will be
possible tonight within the persistent, but modest low-level warm
conveyor that will shift farther inland to the northern Rockies.
With flimsy elevated buoyancy expected (MUCAPE at or below 100
J/kg), overall thunderstorm probabilities appear negligible.

A few lightning flashes were also detected in the last hour across
northwest WA near a shortwave trough, that will rapidly progress
east across far southern AB/SK tonight. This thunder threat is
expected to remain very isolated and diminish east of the Cascades.

..Grams.. 12/16/2025


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