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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, September 6, 2025

SPC Sep 7, 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
0725 PM CDT Sat Sep 06 2025

Valid 070100Z - 071200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Organized severe thunderstorms are not forecast tonight.

...01z Update...

Great Lakes/OH Valley upper trough is progressing steadily east
early this evening. Synoptic cold front is advancing toward the
Atlantic Coast but frontal convection is decidedly weaker as pre
frontal buoyancy is not that great, and now suppressed toward lower
latitudes, well south of stronger deep-layer shear. Thunderstorms
should gradually weaken over the next few hours as boundary layer
continues to cool.

Isolated thunderstorms will also linger across much of the western
U.S. from the southern Rockies, across the Great Basin, into WA/OR.
While a few robust storms may be noted for the next few hours, aside
from locally gusty winds this activity too should weaken with
boundary layer cooling.

..Darrow.. 09/07/2025


Read more CHECK UPDATE ZOOM GRAPHIC


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