754
ACUS11 KWNS 180203
SWOMCD
SPC MCD 180203
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 WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...IND...ILX...LSX...
LAT...LON 38708698 38858584 39068553 39398550 39548573 39558612
39348731 39218886 39078900 38748897 38628856 38618776
38708698
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
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