LIVE MAP (ABOVE) ... SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1146 PM CDT Wed Mar 19 2025
Valid 201200Z - 211200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Thunderstorm development will be possible today in parts of the
Mid-Atlantic and northern Rockies. Severe weather is not expected.
...Synopsis and Discussion...
A strong upper trough will move rapidly across the eastern states
today, with primary midlevel speed max sweeping across the Gulf
Coast states and nosing into the Carolinas during the afternoon.
Cooling aloft with this system will be substantial as a band of
strong meridional flow approaches the East Coast late in the day.
At the surface, a trough will deepen slightly ahead of a cold front
with strongest afternoon push from GA into the Carolinas where 850
mb winds will exceed 40 kt out of the west/southwest.
While an elongated north-south band of precipitation is likely to
accompany the cold front, instability is forecast to be quite weak.
MUCAPE of 100-200 J/kg may develop near the front, perhaps
effectively elevated as the front undercuts meager moisture return
and lapse rates steepen aloft. A plume of steeper low-level lapse
rates will accompany the dry slot from GA into the Carolinas, but
forecast soundings indicate little severe potential due to limited
moisture. As such, severe storms are not forecast, but locally
gusty winds are expected with the band of showers and due to
vertical mixing considerations.
..Jewell/Moore.. 03/20/2025
Read more CHECK UPDATE ZOOM GRAPHIC
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Windy.com Temps | Gusts | WU KORD KPWK |
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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)
Thursday, March 20, 2025
SPC Mar 20, 2025 0600 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)