LIVE MAP (ABOVE) ... SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0649 PM CST Tue Dec 09 2025
Valid 100100Z - 101200Z
...NO THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Thunderstorms are not forecast through tonight.
...Discussion...
A fast moving surface low, associated with a strong mid-level jet
streak, will continue to move east-southeastward toward the western
Great Lakes this evening. Forecast soundings show some very weak
elevated instability within the warm sector, but it does not appear
instability will be deep enough for sufficient charge separation for
any thunderstorm activity. Elsewhere in the CONUS, thunderstorm
activity will be minimal without significant instability in place.
Some lightning has occurred south of the Florida Keys, in the
vicinity of the stalled surface front. However, the lightning
activity has remained well offshore and is expected to remain so.
..Bentley.. 12/10/2025
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TPkY8q
Windy.com Temps | Gusts | WU KORD KPWK |
CLICK for this month's BIG night sky ... | RADAR FULL MAP SCREEN |
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MOBILE DEVICE? Turn sideways. Weather conditions directly above are near Lakefront. Top tabs refer to O'Hare (official).
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.
CONVECTIVE | TORNADO | WIND | HAIL
O'Hare International Airport KORD
(Arlington Heights South)
Chicago Executive Airport KPWK
(Arlington Heights North)
Tuesday, December 9, 2025
SPC Dec 10, 2025 0100 UTC Day 1 Convective Outlook
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)
CHICAGO UTC-6 during CST (Central Standard Time, e.g., winter)
CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)




















