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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.

Sunday, February 11, 2024

SPC Feb 11, 2024 1630 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1630Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1027 AM CST Sun Feb 11 2024

Valid 111630Z - 121200Z

...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
INTO EARLY TONIGHT FROM SOUTHEAST TX TO CENTRAL LA/MS...

...SUMMARY...
A few tornadoes, some of which could be strong, very large hail to
the size of baseballs, and isolated wind damage are all expected
through tonight from southeast Texas into central parts of Louisiana
and Mississippi. More isolated severe storms will be possible into
Alabama and western Georgia.

...Southeast TX today to central LA/MS/AL through tonight...
A midlevel shortwave trough over west TX will continue eastward over
TX/OK through tonight. Associated surface cyclogenesis is expected
today along a baroclinic zone across southeast TX, and the wave
cyclone will subsequently move east-northeastward into MS tonight.
Ongoing/elevated supercells may persist across northern LA through
midday/early afternoon along the northeast edge of the steeper
midlevel lapse rates and larger buoyancy, with large hail/damaging
winds possible. The primary severe threat should evolve from the
ongoing southeast TX supercells, and with additional storm
development near the warm front through the afternoon/evening into
LA/MS.

A moist/unstable warm sector with upper 60s dewpoints and
temperatures warming into the 70s is already established along and
south of the baroclinic zone across southeast TX into southern
LA/MS. The boundary should move a little northward today as a warm
front and provide a focus for additional severe storms through
tonight as far east as MS/AL. The steep midlevel lapse rates
(7.5-8.5 C/km) in 12z observed soundings and long hodographs will
favor isolated very large hail up to 2.5-2.75" diameter with the
more intense supercells today from southeast TX into central LA, and
by this evening into central MS. Low-level shear/hodograph
curvature will be sufficient for tornadic supercells, with some
potential for a couple of strong tornadoes in this same corridor.

..Thompson/Wendt.. 02/11/2024


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