MESO: Mesoscale Discussion 1202

ACUS11 KWNS 241911
SWOMCD
SPC MCD 241911
INZ000-ILZ000-WIZ000-IAZ000-MOZ000-242115-

MESOSCALE DISCUSSION 1202
NWS STORM PREDICTION CENTER NORMAN OK
0211 PM CDT MON JUN 24 2013

AREAS AFFECTED...NRN MO/SERN IA/SRN WI/NRN IL/NWRN INDIANA

CONCERNING...SEVERE THUNDERSTORM WATCH 354...

VALID 241911Z - 242115Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 354
CONTINUES.

SUMMARY...ISOLATED SEVERE THREAT CONTINUES ACROSS WRN PORTIONS OF WW
354. AS THREAT SPREADS GRADUALLY EWD...NEW WW WILL LIKELY BE NEEDED
ACROSS THE REMAINDER OF NRN IL AND POSSIBLY INTO SRN WI/NWRN
INDIANA.

DISCUSSION...LATEST RADAR LOOP SHOWS A BAND OF STRONG/LOCALLY SEVERE
STORMS CROSSING SERN IA AND ADJACENT NERN MO ATTM...ALONG AN
INSTABILITY GRADIENT ON THE NRN FRINGE OF A MODERATE CAPE
ENVIRONMENT ACROSS MO/SRN AND WRN IL.

WITH AMPLE SHEAR INDICATED OVER THE AREA AND A MESOLOW EVIDENT --
NOW CROSSING CENTRAL IA...EXPECT STORMS TO REMAIN AT LEAST LOOSELY
ORGANIZED IN AN ARC-SHAPED BAND AS THEY SPREAD EWD AT AROUND 40 KT
TOWARD THE MS VALLEY. WHILE THREATS FOR LOCALLY DAMAGING WINDS AND
HAIL CONTINUE ACROSS THE WW AREA...EXPANSION OF THIS POTENTIAL
EWD/NEWD WITH TIME WILL LIKELY REQUIRE NEW WW ISSUANCE IN THE NEXT
HOUR OR TWO.

..GOSS.. 06/24/2013

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

ATTN...WFO...IWX...LOT...ILX...MKX...LSX...DVN...ARX...DMX...
EAX...

LAT...LON 40619408 41699266 42249152 42858992 43078788 42478666
40788717 39468880 39709383 40619408

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