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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)
Chicago Executive Airport KPWK (Arlington Heights North)

Tuesday, January 20, 2026

SPC Jan 21, 2026 0100 UTC Day 1 Convective Outlook

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


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0655 PM CST Tue Jan 20 2026

Valid 210100Z - 211200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms are not forecast across the U.S. today or tonight.

...DISCUSSION...
A large-scale cyclonic flow pattern will remain in place over the
U.S. this evening and tonight. At the surface, a large area of high
pressure will be located from the Gulf Coast states northeastward to
the Eastern Seaboard. A dry and cold airmass will remain over much
of the continental U.S. through tonight, making conditions
unfavorable for thunderstorms.

..Broyles.. 01/21/2026


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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)