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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, April 8, 2025

SPC Apr 8, 2025 1630 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1630Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1122 AM CDT Tue Apr 08 2025

Valid 081630Z - 091200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
While organized severe storms are unlikely, isolated strong storms
may occur over far southern Florida and the Keys through early
evening, and perhaps also across southeast Montana to the Black
Hills.

...South Florida/Keys...
A cold front will continue to progress southeastward and move
offshore by evening with scattered showers and thunderstorms
continuing this afternoon ahead of it. While a couple of stronger
storms could occur this afternoon through early evening, poor
mid-level lapse rates and weak deep-layer shear should mitigate
overall storm strength. A positively tilted shortwave trough will
approach the region later tonight. But with the front having
progressed offshore, thunderstorm potential (including any severe
risk) over land should remain very low.

...North-central High Plains..
A shortwave trough is forecast to move from the northern Rockies
into the southern Canadian Prairies, while moderate mid-level flow
expands eastward from the Pacific Northwest into the northern High
Plains. Widely scattered high-based convection is possible during
the afternoon and evening from southeast Montana/northern Wyoming to
the Black Hills as modest large-scale ascent influences areas that
have destabilized amid boundary-layer heating. Weak buoyancy should
temper overall updraft strength, but a few instances of
stronger/gusty thunderstorm winds may occur.

..Guyer/Lyons.. 04/08/2025


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