ZCZC SPCSWOMCD ALL
ACUS11 KWNS 081750 
SPC MCD 081750 
INZ000-KYZ000-ILZ000-MOZ000-081915-

MESOSCALE DISCUSSION 0231
NWS STORM PREDICTION CENTER NORMAN OK
1250 PM CDT WED APR 08 2015

AREAS AFFECTED...CNTRL/SRN IL/IND...E-CNTRL MO

CONCERNING...SEVERE POTENTIAL...SEVERE THUNDERSTORM WATCH LIKELY 

VALID 081750Z - 081915Z

PROBABILITY OF WATCH ISSUANCE...80 PERCENT

SUMMARY...LARGE HAIL AND ISOLATED DAMAGING WINDS SHOULD ACCOMPANY
SCATTERED STORMS THIS AFTERNOON. A BRIEF TORNADO IS ALSO POSSIBLE.

DISCUSSION...GRAVITY WAVE/DIFFUSE OUTFLOW ORIGINATING FROM AN MCS
NOW OVER THE UPPER OH VALLEY HAS STALLED ACROSS SRN IL/IND PER
VISIBLE SATELLITE IMAGERY. DEEP CONVECTION APPEARS TO HAVE BECOME
SUSTAINED ALONG IT...WITH MODEST LOW-LEVEL WAA/ISENTROPIC LIFT.
ALTHOUGH OVERALL EVOLUTION IS UNCLEAR GIVEN THE DIFFUSE FORCING
MECHANISM...STEEP MID-LEVEL LAPSE RATES AND A MODERATELY UNSTABLE
AIR MASS AMIDST 30-40 KT EFFECTIVE SHEAR WILL SUPPORT TRANSIENT
SUPERCELLS AND CLUSTERS WITH PRIMARY RISKS OF LARGE HAIL AND STRONG
TO LOCALLY SEVERE WIND GUSTS

..GRAMS/CORFIDI.. 04/08/2015

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

ATTN...WFO...LMK...IND...PAH...ILX...LSX...SGF...

LAT...LON   38729190 39089162 39459082 40028971 40308902 40258807
            39728726 39128656 38788596 38608556 38388544 38178554
            38098639 38078753 38218865 38229025 38109120 38229190
            38369195 38729190 

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