418
ACUS11 KWNS 102327
SWOMCD
SPC MCD 102327
OHZ000-INZ000-MIZ000-ILZ000-110030-
MESOSCALE DISCUSSION 0194
NWS STORM PREDICTION CENTER NORMAN OK
0627 PM CDT TUE MAR 10 2026
AREAS AFFECTED...PORTIONS OF FAR NORTHEASTERN ILLINOIS INTO NORTHERN
INDIANA
CONCERNING...TORNADO WATCH 32...
VALID 102327Z - 110030Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 32 CONTINUES.
SUMMARY...AN INTENSE SUPERCELL OVER EASTERN KANKAKEE COUNTY IL IS
LIKELY TO PERSIST ALONG THE WARM FRONT WITH A RISK FOR VERY LARGE
HAIL AND STRONG TORNADOES THIS EVENING. A DOWNSTREAM TORNADO WATCH
WILL ALSO NEED TO BE ISSUED INTO NORTHERN IN.
DISCUSSION...AN INTENSE SUPERCELL OVER PORTIONS OF EASTERN KANKAKEE
COUNTY IL HAS SHOWN SIGNS OF RAPID ORGANIZATION OVER THE LAST 30
MINUTES. SEVERAL RECENT REPORTS OF VERY LARGE HAVE BEEN NOTED ALONG
WITH AN INTENSIFYING LOW-LEVEL MESOCYCLONE FROM RADAR IMAGERY. THE
ENVIRONMENT ALONG THE WARM FRONT FROM EASTERN IL INTO NORTHERN IN
REMAINS VERY FAVORABLE FOR INTENSE SUPERCELLS WITH MODERATE
INSTABILITY AND ESRH 300-400 M2/S2. THIS IS YIELDING EFFECTIVE STP
VALUES OF 4-5.
GIVEN THE ISOLATED NATURE OF THE SUPERCELL, STRONGLY BACKED
LOW-LEVEL FLOW/SHEAR, TORNADOES (STRONG TO INTENSE) ALONG WITH VERY
LARGE HAIL APPEAR LIKELY OVER THE NEXT HOUR OR TWO. THIS SHOULD
CONTINUE INTO NORTHERN IN, WITH THE POTENTIAL FOR ADDITIONAL STORMS
TO DEVELOP OVER THE NEXT COUPLE OF HOURS. GIVEN THE PROXIMITY TO THE
EASTERN EDGE OF TORNADO WATCH 32, A DOWNSTREAM WATCH OVER PORTIONS
OF IN WILL LIKELY BE NEEDED IN THE NEXT COUPLE OF HOURS.
..LYONS.. 03/10/2026
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...IWX...LOT...
LAT...LON 41258809 41548758 41588713 41778608 41708541 41648481
41428470 41068467 40848468 40768538 40718602 40748645
40798688 40948802 41258809
MOST PROBABLE PEAK TORNADO INTENSITY...140-170 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...2.00-3.50 IN
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