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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)

Thursday, March 20, 2025

SPC Mar 21, 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
0735 PM CDT Thu Mar 20 2025

Valid 210100Z - 211200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Isolated thunderstorms possible for a short time this evening over
the coastal Mid-Atlantic, with sporadic lightning flashes over the
northern Rockies. Severe weather is not expected.

...Synopsis...
Scattered showers and thunderstorms currently exist along the cold
from over the Mid Atlantic, and remain weak due to limited
instability. This front will continue to push rapidly offshore along
with the parent trough. Elsewhere, isolated lightning flashes remain
possible this evening over the northern Rockies beneath an upper
wave within the northwest flow regime. However, this activity is
expected to wane as well with the loss of heating.

..Jewell.. 03/21/2025


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CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)