034
ACUS11 KWNS 272319
SWOMCD
SPC MCD 272318
TNZ000-KYZ000-ILZ000-280015-
MESOSCALE DISCUSSION 1357
NWS STORM PREDICTION CENTER NORMAN OK
0618 PM CDT SAT JUN 27 2026
AREAS AFFECTED...PORTIONS OF WESTERN KENTUCKY
CONCERNING...SEVERE THUNDERSTORM WATCH 403...
VALID 272318Z - 280015Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 403
CONTINUES.
SUMMARY...A CORRIDOR OF LOCALLY GREATER SEVERE POTENTIAL MAY EXIST
ACROSS PORTIONS OF SEVERE THUNDERSTORM WATCH 403 ALONG REMNANT
OUTFLOW BOUNDARY.
DISCUSSION...LATEST SURFACE ANALYSIS PLACES A REMNANT OUTFLOW
BOUNDARY FROM JUST SOUTH OF PADUCAH, KENTUCKY, INTO NORTHERN
TENNESSEE. CONVECTION ALONG THIS BOUNDARY IN THE VICINITY OF PAH HAS
EXHIBITED MARGINAL SUPERCELL STRUCTURES WITH WEAK ROTATION
SIGNATURES OVER THE PAST 1-2 HOURS. A MOIST AND UNSTABLE AIR MASS
SOUTH OF THE REMNANT BOUNDARY AIDED BY 40-50 KTS OF MID-LEVEL FLOW
(SAMPLED BY REGIONAL VWPS) AND EFFECTIVE SHEAR OF AROUND 30 KTS
ALONG THE SOUTHERN FLANK OF TWO MID-LEVEL MCVS WILL CONTINUE TO
SUPPORT MARGINAL SUPERCELL STRUCTURES THROUGH THIS EVENING, WITH THE
LATEST HIGH-RES GUIDANCE SUGGESTING THAT THIS CONVECTION MAY
CONTINUE TO PROGRESS ALONG THIS BOUNDARY. IN THIS SCENARIO, A
CORRIDOR OF LOCALLY GREATER SEVERE POTENTIAL MAY DEVELOP, WITH THE
POTENTIAL FOR WATER-LOADED DOWNBURSTS AND DAMAGING WIND GUSTS. A
BRIEF TORNADO OR TWO IS ALSO POSSIBLE GIVEN ENHANCED LOW-LEVEL SHEAR
ALONG THIS BOUNDARY (~100 M2/S2 0-500 M SRH SAMPLED DOWNSTREAM OF
THE AFOREMENTIONED CONVECTION BY THE HPX/OHX VWPS).
..CHALMERS.. 06/27/2026
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...LMK...OHX...PAH...
LAT...LON 37338864 37338839 37268771 37178725 37018696 36828683
36658693 36628717 36678766 36828834 36978866 37118878
37338864
MOST PROBABLE PEAK TORNADO INTENSITY...85-110 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
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