369
ACUS11 KWNS 040109
SWOMCD
SPC MCD 040109
SDZ000-040245-
MESOSCALE DISCUSSION 0975
NWS STORM PREDICTION CENTER NORMAN OK
0809 PM CDT WED JUN 03 2026
AREAS AFFECTED...PARTS OF SOUTH-CENTRAL INTO SOUTHEAST SD
CONCERNING...TORNADO WATCH 271...
VALID 040109Z - 040245Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 271 CONTINUES.
SUMMARY...SOME THREAT FOR TORNADOES, LARGE TO VERY LARGE HAIL, AND
LOCALIZED SEVERE GUSTS WILL CONTINUE THROUGH DUSK.
DISCUSSION...A LONG-LIVED SUPERCELL WITH A HISTORY OF PRODUCING A
TORNADO IS ONGOING THIS EVENING BETWEEN CHAMBERLAIN AND WINNER, SD.
A GENERAL INCREASE IN CONVECTION HAS BEEN NOTED TO THE
EAST/NORTHEAST OF THIS CELL, AND ALSO TO ITS SOUTH ALONG A COLD
FRONT. WHILE LOW-LEVEL FLOW IS GENERALLY MODEST ACROSS THE REGION,
SOME INCREASE HAS RECENTLY BEEN NOTED IN THE KABR VWP. ALSO, SURFACE
OBSERVATIONS INDICATE STRENGTHENING SOUTHEASTERLY SURFACE WINDS TO
THE EAST OF THE PRIMARY SUPERCELL AND EXPANDING AREA OF CONVECTION,
SUGGESTING SOME LOCALIZED INCREASE IN LOW-LEVEL SHEAR/SRH. AS A
RESULT, SOME TORNADO THREAT WILL CONTINUE WITH THIS INCREASING STORM
CLUSTER THROUGH DUSK. INCREASING STORM COVERAGE MAY RESULT IN MODEST
UPSCALE GROWTH AND AN INCREASING SEVERE-WIND THREAT, THOUGH CELL
MERGERS COULD ALSO BRIEFLY ENHANCE TORNADO POTENTIAL. OTHERWISE,
LARGE TO VERY LARGE HAIL WILL CONTINUE TO BE A THREAT WITH ANY
SUSTAINED SUPERCELLS.
..DEAN.. 06/04/2026
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...FSD...ABR...UNR...
LAT...LON 43099989 43639971 44289864 44459772 44289756 43869750
43559762 43299792 43109841 43109894 43099989
MOST PROBABLE PEAK TORNADO INTENSITY...100-125 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN
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