LIVE MAP (ABOVE) ... SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1100 AM CDT Fri Oct 31 2025
Valid 311630Z - 011200Z
...NO THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Thunderstorm potential will remain low through tonight.
...Synopsis and Discussion...
With longwave upper troughing dominating east of the Rockies and the
prevalence of continental surface trajectories, the large-scale
pattern will remain generally unfavorable for thunderstorms over the
CONUS today. Occasional lightning flashes could occur across
northern New England with focused ascent near a surface low and
northward-shifting front, but this potential will remain limited and
further diminish this afternoon. Weak elevated convection may
develop late tonight across west-central Texas as low-level warm
advection increases, but forecast thermodynamic profiles suggest
that charge separation is unlikely prior to 12Z Saturday.
..Gleason/Thornton.. 10/31/2025
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TP0LGL
Windy.com Temps | Gusts | WU KORD KPWK |
CLICK for this month's BIG night sky ... | RADAR FULL MAP SCREEN |
|---|
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)
Friday, October 31, 2025
SPC Oct 31, 2025 1630 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)




















