LIVE MAP (ABOVE) ... SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1114 AM CDT Sat Oct 17 2026
Valid 171630Z - 181200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Organized severe thunderstorms are not forecast through tonight.
...Synopsis...
Water-vapor imagery late this morning shows a positive-tilt upper
trough over the East and a closed low near the California/Baja
California border. An extensive area of tranquil conditions
influenced by surface high pressure will prevail across much of the
contiguous U.S. Widely scattered diurnal thunderstorms are possible
across the southern half of the FL Peninsula primarily through
sunset before much of the convective activity is relegated to the FL
Straits and offshore waters tonight. Weak thunderstorms are
possible tonight in association with the upper low over southern AZ.
..Smith/Supinie.. 10/17/2026
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TVyHQ8
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)
Saturday, October 17, 2026
SPC Oct 17, 2026 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)




















