SWOMCD
SPC MCD 251714
ILZ000-WIZ000-IAZ000-MNZ000-251815-
MESOSCALE DISCUSSION 1313
NWS STORM PREDICTION CENTER NORMAN OK
1214 PM CDT THU JUN 25 2009
AREAS AFFECTED...SERN MN...NERN IA...SWRN WI...NWRN IL
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 251714Z - 251815Z
CONVECTION IS EXPECTED TO INCREASE OVER THE NEXT FEW HOURS...WITH
CLUSTERS OF STORMS CAPABLE OF PRODUCING DMGG WINDS AND LARGE HAIL
MOVING SEWD WITH TIME. AREA IS BEING MONITORED FOR A POSSIBLE WW.
AGITATED CU FIELD HAS DEVELOPED AHEAD OF A WEAK SURFACE LOW JUST
WEST OF CID...AND ALONG A DIFFUSE SURFACE FRONT DRAPED NEAR THE
MN/IA BORDERS SEWD INTO SRN WI. STORMS WILL GRADUALLY BEGIN TO
DEVELOP UNDER INCREASING UPPER DIVERGENCE AS AN UPPER TROUGH GLANCES
THE AREA TO THE NORTHEAST AND AMPLE SURFACE HEATING/SURFACE DEW
POINTS IN THE MID 70S EFFECTIVELY WEAKEN ANY REMAINING CINH. DRIER
AIR ALOFT OBSERVED ON WV IMAGERY AND STEEP LOW/MID LEVEL LAPSE RATES
REPRESENTED ON 12Z SOUNDINGS WILL BE FAVORABLE FOR CLUSTERS OF
STORMS CAPABLE OF DMGG WINDS AND LARGE HAIL AS EFFECTIVE SHEAR NEAR
30 TO 35 KTS MAINTAINS SOME ORGANIZATION.
..HURLBUT.. 06/25/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LOT...ILX...MKX...LSX...DVN...ARX...MPX...DMX...
LAT...LON 40288910 39569015 39889109 40919146 42139197 43239306
44149324 44369213 43509041 41658947 40288910
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