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MESOSCALE DISCUSSION 0819
NWS STORM PREDICTION CENTER NORMAN OK
0705 PM CDT WED MAY 13 2009
AREAS AFFECTED...NERN MO/SERN IA/W CENTRAL IL
CONCERNING...TORNADO WATCH 293...
VALID 140005Z - 140130Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 293 CONTINUES.
SEVERE/TORNADO THREAT CONTINUES AS STORMS CONTINUE MOVING EWD ACROSS
THE ERN HALF OF THE WW.
STRONG/SEVERE STORMS CONTINUE...WITH A LARGE/PERSISTENTLY-ROTATING
SUPERCELL CROSSING THE KNOX/CLARK/LEWIS COUNTY AREAS ATTM. THIS
STORM HAS A HISTORY OF PRODUCING A DAMAGING TORNADO...AND CONTINUES
TO EXHIBIT STRONG ROTATION.
MODERATE INSTABILITY/AROUND 2000 J/KG MIXED-LAYER CAPE/ REMAINS IN
PLACE AHEAD OF THE CONVECTIVE BAND...WHICH WILL FUEL ONGOING
CONVECTION AND ASSOCIATED THREAT FOR HAIL AND DAMAGING WINDS.
ADDITIONALLY...WITH LOCALLY-BACKED/SLY SURFACE FLOW INVOF THE
WNW-ESE WARM FRONT /STRETCHING FROM NERN MO TO SWRN
INDIANA/...THREAT FOR TORNADOES WILL PERSIST OVER THE NEXT COUPLE OF
HOURS.
..GOSS.. 05/14/2009
ATTN...WFO...ILX...LSX...DVN...EAX...
LAT...LON 39179231 39649300 40489196 41359221 42029069 41428973
39298982 39179231
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