ZCZC SPCSWOMCD ALL
ACUS11 KWNS 310250 
SPC MCD 310250 
SDZ000-310345-

MESOSCALE DISCUSSION 1452
NWS STORM PREDICTION CENTER NORMAN OK
0950 PM CDT SAT JUL 30 2016

AREAS AFFECTED...PORTIONS OF CNTRL SD

CONCERNING...SEVERE THUNDERSTORM WATCH 425...

VALID 310250Z - 310345Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 425
CONTINUES.

SUMMARY...THE MAIN THREAT ACROSS SOUTHERN PORTIONS OF WW 425 IS
TRANSITIONING TO DAMAGING WINDS.

DISCUSSION...A LONG-LIVED SUPERCELL MOVED SWD FROM POTTER TO HUGHES
COUNTY SD OVER THE PAST 90 MINUTES...PRODUCING LARGE HAIL UP TO
BASEBALL SIZE AT 0209Z IN FAR SRN SULLY COUNTY SD PER A LOCAL STORM
REPORT. SINCE THEN...ADDITIONAL CONVECTIVE DEVELOPMENT HAS OCCURRED
OVER SERN STANLEY COUNTY SD...AND HAS JOINED WITH THE SUPERCELL IN
THE VICINITY OF PIERRE SD AS OF 0250Z. RESULTANT SMALL CLUSTER OF
THUNDERSTORMS WILL LIKELY HAVE MORE OF A LOCALLY DAMAGING WIND RISK
FOR THE NEXT SEVERAL HOURS AS IT MOVES SWD...AS EVIDENCED BY A 51 KT
WIND GUST AT KPIR AS OF 0242Z. A STRENGTHENING LOW-LEVEL JET ACROSS
SRN SD/NRN NEB AND SUFFICIENT DOWNSTREAM INSTABILITY WILL PROBABLY
ALLOW FOR THIS CLUSTER TO MAINTAIN ITS INTENSITY IN THE SHORT TERM.

..GLEASON.. 07/31/2016

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...ABR...

LAT...LON   43890095 44480099 44680009 44649943 43799943 43790032
            43890095 

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