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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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O'Hare International Airport KORD (Arlington Heights South)
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Thursday, November 27, 2025

SPC Nov 27, 2025 1300 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1300Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0647 AM CST Thu Nov 27 2025

Valid 271300Z - 281200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Severe storms are not anticipated today.

...FL...
A large upper trough remains dominant over the eastern U.S. today,
with a cold front sweeping southward across FL. A few thunderstorms
will be possible over central/south FL through the afternoon, but
low-level drying will eventually stabilize the air mass and end the
convective threat after dark.

...PA/NY...
Cold temperatures aloft and warm lake temperatures could be
sufficient for a few lightning strikes in the lee of Lake Erie and
Ontario today. Forecast soundings suggest mid-level lapse rates and
the depth of the unstable layer will be sufficient for occasional
thundersnow through today and this evening.

..Hart/Dean.. 11/27/2025


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SUNRISE AND SUNSET TIMES IN UTC (if you're not logged in to Google)
CHICAGO UTC-6 during CST (Central Standard Time, e.g., winter)
CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)