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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, March 17, 2026

SPC Mar 17, 2026 1300 UTC Day 1 Convective Outlook

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


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0612 AM CDT Tue Mar 17 2026

Valid 171300Z - 181200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Organized thunderstorm activity is not anticipated today.

...Synopsis...
The powerful upper trough that produced severe storms along the
eastern Seaboard yesterday has moved away, with its associated
surface cold front ushering in dry/stable conditions across the
CONUS. The only area of some concern for a lightning strike or two
would be over south FL and the Keys, in vicinity of the
aforementioned cold front. This activity will primarily be
offshore, and is expected to remain below 10% coverage.

..Hart/Weinman.. 03/17/2026


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