LIVE MAP (ABOVE) ... SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0738 PM CDT Tue Sep 16 2025
Valid 170100Z - 171200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN NORTHWEST KS
AND SOUTHWEST NE...
...SUMMARY...
A diminishing severe threat is expected over the central Great
Plains tonight.
...CO/KS/NE...
Primary severe potential will remain over the next 1-2 hours with
several semi-discrete updrafts across northeast CO, southwest NE,
and northwest KS. Strong low-level convergence in the tri-state
border area will foster amalgamation of these updrafts into a
broader cluster. This will hamper sustained hail growth and support
a diminishing severe threat. With only moderate mid-level
west-southwesterlies sampled in upstream VWPs along the Front Range
and nocturnally increasing MLCIN across the warm sector, later
evening clusters should struggle to greatly organize and severe wind
potential should remain isolated/sporadic.
..Grams.. 09/17/2025
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TN6jLC
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, September 16, 2025
SPC Sep 17, 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)