LIVE MAP (ABOVE) ... SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0709 AM CDT Sun Sep 07 2025
Valid 071300Z - 081200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS
OF THE CENTRAL AND SOUTHERN HIGH PLAINS...
...SUMMARY...
A few stronger thunderstorms capable of marginally severe wind
gusts/hail are possible across portions of the central and southern
High Plains late this afternoon through the early evening.
...Central/Southern High Plains...
Morning water-vapor imagery shows a low/trough over the eastern
Pacific with a downstream ridge over the Rockies. A couple of weak
disturbances are cresting the ridge and may aid in storm development
later this afternoon/evening over the central High Plains later
today.
In the low levels, a lee trough and an associated moisture plume
over the High Plains will provide a focus for isolated to widely
scattered storms. Strong heating over the High Plains will
contribute to weak to moderate buoyancy by late afternoon.
South-southeasterly low-level winds veering to around 20-kt
northwesterly mid-level flow will support some modest updraft
organization. The stronger storms may yield an isolated severe-hail
(diameter 1.5 inches or less) and wind-gust (55-65 mph) threat. A
small cluster or two is expected to evolve during the evening
coincident with an increase in the LLJ. This activity will likely
move east-southeast into western KS and the OK/TX Panhandles, where
a cooling boundary layer and increasing CINH will act to limit
severe potential by mid-late evening.
..Smith/Broyles.. 09/07/2025
Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/TMwtXg
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)
Sunday, September 7, 2025
SPC Sep 7, 2025 1300 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)




















