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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.

ARLINGTON HEIGHTS WEATHER
O'Hare International Airport KORD (Arlington Heights South)
Chicago Executive Airport KPWK (Arlington Heights North)

Saturday, March 28, 2026

SPC Mar 28, 2026 0600 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1200Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1246 AM CDT Sat Mar 28 2026

Valid 281200Z - 291200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Isolated thunderstorms will be possible this afternoon across the
southern Florida Peninsula and Florida Keys, but no severe threat is
forecast.

...DISCUSSION...
Northwest mid-level flow will continue across much of the central
and eastern U.S. today, as a cold front advances southward across
Florida. Isolated thunderstorms will be possible south of the front
within a moist airmass across parts of south Florida and the Florida
Keys this afternoon. No severe threat is forecast, and no
thunderstorms are expected over the remainder of the continental
U.S.

..Broyles/Chalmers.. 03/28/2026


Read more CHECK UPDATE ZOOM GRAPHIC


http://dlvr.it/TRlJmC

Friday, March 27, 2026

SPC Mar 28, 2026 0100 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 0100Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0756 PM CDT Fri Mar 27 2026

Valid 280100Z - 281200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Isolated thunderstorms will be possible this evening over parts of
the Carolinas and southern Virginia, but no severe threat is
forecast.

...DISCUSSION...
An upper-level trough will dig southeastward across the Great Lakes
region tonight, as a cold front advances southward through the
Carolinas. A few thunderstorms will be possible near and behind the
front this evening. No severe threat is forecast with this activity
or over the remainder of the continental U.S. through tonight.

..Broyles.. 03/28/2026


Read more CHECK UPDATE ZOOM GRAPHIC


http://dlvr.it/TRl7nP

SPC Mar 27, 2026 2000 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 2000Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0217 PM CDT Fri Mar 27 2026

Valid 272000Z - 281200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Isolated thunderstorms are expected today over parts of the
Carolinas and southern Appalachians, but no severe threat is
forecast.

Only minor changes have been made to the ongoing forecast - to
remove 10% thunder probabilities from parts of WV/KY. Isolated
lightning flashes in northwest AR are expected to remain below 10%
coverage.

..Hart.. 03/27/2026

.PREV DISCUSSION... /ISSUED 1115 AM CDT Fri Mar 27 2026/

...Synopsis...
A belt of strong cyclonic mid-level flow will extend from the
northern Plains through the OH Valley and into the Northeast through
tonight. A mid-level anticyclone will remain centered over the
Chihuahua-Texas border as heights gradually lower as troughing
pivots slowly east across the East. The southern periphery of
stronger westerly mid and high-level flow will glance NC later
today.

In the low levels, a cold front analyzed over the Cumberland Gap
eastward to the Delmarva, will push southeast through the Carolinas
by late tonight. Strong heating ahead of the boundary and dewpoints
in the 55-60 deg F range will contribute to weak buoyancy and
steepened low-level lapse rates by mid afternoon. Isolated to
widely scattered thunderstorms are forecast to develop near the
front late this afternoon into the early evening. Forecast
soundings show only weak surface to 2-km flow (at or below 10-15 kt)
across the Carolina Piedmont. The weaker boundary layer flow and
weak buoyancy (few hundred J/kg SBCAPE) will likely limit overall
storm intensity. Although a strong gust or two is possible (35-50
mph), the propensity for an appreciable wind-damage risk still
appears sufficiently low at this time to preclude a categorical-risk
highlight over the Carolina Piedmont.


Read more CHECK UPDATE ZOOM GRAPHIC


http://dlvr.it/TRl0Sp

SPC Mar 27, 2026 0600 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1200Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1251 AM CDT Fri Mar 27 2026

Valid 271200Z - 281200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Isolated thunderstorms are expected today from the Ohio Valley into
North Carolina and Virginia but no severe threat is forecast.

...DISCUSSION...
An upper-level trough will dig southeastward across the eastern U.S.
today. At the surface, a cold front will advance southward into the
southern Appalachians and Carolinas. Behind the front, isolated
thunderstorm development with a potential for a few strong gusts,
will be possible in weak instability this afternoon. Elsewhere
across the continental U.S., thunderstorms are not expected today or
tonight.

..Broyles/Chalmers.. 03/27/2026


Read more CHECK UPDATE ZOOM GRAPHIC


http://dlvr.it/TRkPHY
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)