ZCZC SPCSWOMCD ALL
ACUS11 KWNS 240555 
SPC MCD 240555 
SDZ000-NEZ000-MTZ000-WYZ000-240630-

MESOSCALE DISCUSSION 1150
NWS STORM PREDICTION CENTER NORMAN OK
1255 AM CDT WED JUN 24 2015

AREAS AFFECTED...WRN SD...NE WY

CONCERNING...SEVERE THUNDERSTORM WATCH 347...

VALID 240555Z - 240630Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 347
CONTINUES.

SUMMARY...A SMALL CLUSTER OF THUNDERSTORMS WILL MOVE EAST ACROSS THE
WATCH AREA EARLY THIS MORNING WITH A RISK FOR LARGE HAIL AND
DAMAGING WINDS.

DISCUSSION...FORCING FOR ASCENT/DCVA DOWNSTREAM FROM A SUBTLE
SHORT-WAVE TROUGH MOVING THROUGH THE NRN INTERMOUNTAIN REGION IN
CONCERT WITH LOW-LEVEL UPSLOPE FLOW HAS FOSTERED A SMALL CLUSTER OF
TSTMS EARLY THIS MORNING OVER NERN WY.  AND WHILE THE THERMODYNAMIC
ENVIRONMENT IS CHARACTERIZED BY ONLY MARGINAL
INSTABILITY...NON-HYDROSTATIC PRESSURE PERTURBATIONS --ARISING FROM
THE STRONG VERTICAL SHEAR-- WILL CONTRIBUTE TO UPDRAFT INTENSITY AND
A PROLONGED RISK FOR LARGE HAIL AND DAMAGING WINDS AS ACTIVITY
SPREADS EWD INTO THE BLACK HILLS EARLY THIS MORNING.

..MEAD.. 06/24/2015

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

ATTN...WFO...LBF...UNR...CYS...BYZ...

LAT...LON   43000208 43000208 43000248 43000405 43500508 43500508
            44220508 44520508 44790508 45000508 45200404 45200397
            45200369 45200355 45200348 45200300 45200295 45040200
            45040200 44500200 44340200 43990201 43700201 43000208
            43000208 

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