ACUS11 KWNS 180203
SWOMCD
SPC MCD 180203=20
INZ000-ILZ000-180330-

Mesoscale Discussion 1174
NWS Storm Prediction Center Norman OK
0903 PM CDT Wed Jun 17 2026

Areas affected...Southeast Illinois into southern Indiana

Concerning...Tornado Watch 342...344...

Valid 180203Z - 180330Z

The severe weather threat for Tornado Watch 342, 344 continues.

SUMMARY...The corridor of highest tornado potential continues to
shift eastward across southeastern Illinois and southern Indiana --
within Tornado Watches 342/344.

DISCUSSION...An east/west-oriented band of tornadic supercells
continues tracking east-southeastward across southeastern IL into
southern IN -- along the southern periphery of a lingering larger
convective cluster. These storms now have access to fully recovered
PBL air (upper 70s to lower 80s temperatures amid upper 60s
dewpoints). Given a large, clockwise curved hodograph sampled by
nearby VWPs (likely around 600 m2/s2 effective SRH), the tornado
risk risk (some strong to intense) will continue tonight.

..Weinman.. 06/18/2026

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!86fOYt0BRb8t0hEtHGjy-Hdo4lo0ZhP0TZdK-NyTzMl2gC8KaTMbpg0vPSigQtJLSFcJMKJoF= d_7Vfoj6X755CRD-Mg$ for graphic product...

ATTN...WFO...IND...ILX...LSX...

LAT...LON 38708698 38858584 39068553 39398550 39548573 39558612
39348731 39218886 39078900 38748897 38628856 38618776
38708698=20

MOST PROBABLE PEAK TORNADO INTENSITY...120-145 MPH
MOST PROBABLE PEAK WIND GUST...65-80 MPH
MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN


=3D =3D =3D
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