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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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Monday, February 17, 2025

SPC Feb 18, 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
0630 PM CST Mon Feb 17 2025

Valid 180100Z - 181200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
The risk for thunderstorms should remain negligible tonight.

...Discussion...
Conditions will be too dry/stable for lightning-producing convection
across much of the CONUS through the period. A lone thunderstorm
occurred in the past hour over western CO amid scant buoyancy and
very steep lapse rates per the 00Z GJT sounding. While an additional
storm or two might occur in the next hour or so, amid moderate
large-scale ascent, predominately sub-freezing thermodynamic
profiles with eastern extent across the CO Rockies and adjacent High
Plains should largely mitigate thunderstorm potential.

..Grams.. 02/18/2025


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