801
ACUS11 KWNS 180428
SWOMCD
SPC MCD 180427
OHZ000-KYZ000-INZ000-180600-
MESOSCALE DISCUSSION 1175
NWS STORM PREDICTION CENTER NORMAN OK
1127 PM CDT WED JUN 17 2026
AREAS AFFECTED...SOUTHEASTERN INDIANA...SOUTHWEST OHIO...AND FAR
NORTHERN KENTUCKY
CONCERNING...TORNADO WATCH 344...347...
VALID 180427Z - 180600Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 344, 347 CONTINUES.
SUMMARY...THE TORNADO RISK IS FOCUSING ACROSS SOUTHEASTERN INDIANA
INTO SOUTHWESTERN OHIO TONIGHT -- WITHIN TORNADO WATCHES 344/347.
DISCUSSION...WITHIN A BROAD AREA OF STRATIFORM RAIN SPREADING ACROSS
IN INTO OH, LOWER 70S TEMPERATURES AMID UPPER 60S DEWPOINTS ARE
STILL YIELDING SURFACE-BASED INFLOW PARCELS FOR A FEW
DEEPER/EMBEDDED ROTATING UPDRAFTS. THE ILN VWP IS SAMPLING THE CORE
OF A 60-KT LLJ OVERSPREADING THIS ACTIVITY, WHICH IS SUPPORTING A
VERY LARGE, CLOCKWISE CURVED HODOGRAPH (AROUND 450 M2/S2 0-500M
SRH). DESPITE MARGINAL BUOYANCY, THIS WIND PROFILE IS SUPPORTING
EFFICIENT MESOCYLOGENESIS FROM SOUTHEASTERN IN INTO SOUTHWESTERN OH.
THE PRIMARY TORNADO RISK SHOULD CONTINUE EAST-NORTHEASTWARD BENEATH
THE CORE OF THE LLJ AND IN A REGION OF ENHANCED SURFACE PRESSURE
FALLS TONIGHT. GIVEN THE STRONG LOW-LEVEL SHEAR/STREAMWISE VORTICITY
AND SUPERCELL STRUCTURES, A STRONG TORNADO REMAINS POSSIBLE WITH THE
LONGER-LIVED STORMS.
..WEINMAN.. 06/18/2026
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...ILN...LMK...IND...
LAT...LON 38628498 38698588 39048618 39388607 39878423 39838384
39658351 39338339 38928356 38718403 38628498
MOST PROBABLE PEAK TORNADO INTENSITY...100-125 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN
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