Subj : MESO: Mesoscale Discussion 1508
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Thu Jul 13 2023 00:08:22

ACUS11 KWNS 130008
SWOMCD
SPC MCD 130007 COR
INZ000-MIZ000-ILZ000-130100-

Mesoscale Discussion 1508
NWS Storm Prediction Center Norman OK
0707 PM CDT Wed Jul 12 2023

Areas affected...Northeastern Illinois...Northern Indiana...Michigan

Concerning...Tornado Watch 477...

Valid 130007Z - 130100Z

CORRECTED FOR AREAS AFFECTED

The severe weather threat for Tornado Watch 477 continues.

SUMMARY...Tornado threat continues within WW477.

DISCUSSION...Confirmed tornadoes were have occurred across northern
Illinois in the last hour. Surface objective analysis indicates
200-300 m2/s2 effective SRH near a lifting warm front located across
northern Illinois near the Chicago metro. A low-level jet axis of
30-35 kts extends across north Central Illinois and will gradually
shift eastward across Lake Michigan northern Indiana/Michigan
through the next few hours. The threat area will likely also shift
eastward through time as this occurs. A downstream watch may be
needed in the next couple of hours.

...Thornton/Guyer.. 07/13/2023

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!7g4piINc3xdGbfe-scP1oOV5DAEGAVYAmQJJwy9TV4_NypgPtNi5E6fapeo4dANDzc3tS8Yyv=
GbRl62QpTEp6bzNHsw$  for graphic product...

ATTN...WFO...IWX...GRR...LOT...

LAT...LON   42278729 42218694 42188653 42058611 41988594 41788581
            41608576 41438581 41268603 41208624 41188638 41208660
            41248693 41268707 41268718 41308759 41328781 41388803
            41508829 41708839 41878834 42008832 42118824 42228817
            42308808 42338796 42328769 42298741 42278729=20


=3D =3D =3D
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