LIVE MAP (ABOVE) ... SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0621 PM CST Wed Dec 17 2025
Valid 180100Z - 181200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Isolated thunderstorms are possible along portions of the TX/LA Gulf
coasts tonight.
...01z Update...
Weak, southern-stream short-wave trough is advancing off the south
TX coast early this evening. A few thunderstorms linger near the
center of a weak midlevel circulation around the Corpus Christi
region; however, the most concentrated deep convection is now
focused offshore and should continue to be shunted east ahead of the
short wave.
Isolated thunderstorms may eventually develop ahead of this feature
downstream across southeast LA later tonight, but negligible
buoyancy currently exists on the 00z sounding from LIX. By the end
of the period, adequate destabilization should materialize across
this region such that lightning is possible with deep convection,
primarily after 08-09z.
..Darrow.. 12/18/2025
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TPtGpH
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)
Wednesday, December 17, 2025
SPC Dec 18, 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)




















