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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)

Saturday, February 21, 2026

SPC Feb 22, 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
0624 PM CST Sat Feb 21 2026

Valid 220100Z - 221200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Severe thunderstorms are not forecast tonight.

...01z Update...

Westerly flow is deepening/strengthening across the Southeast early
this evening as northern/southern-streams begin to phase later
tonight, in response to the maturing upper trough. Scattered
thunderstorms continue along the frontal zone from coastal MS into
southern GA, but have struggled to attain appreciable intensity.
While deep-layer flow is more than adequate for sustaining robust
updrafts, current trends suggest the primary risk with this activity
will be sub-severe wind gusts and maybe some small hail. As a
result, severe probabilities will be lowered for the rest of the
period.

..Darrow.. 02/22/2026


Read more CHECK UPDATE ZOOM GRAPHIC


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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)