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MESOSCALE DISCUSSION 0821
NWS STORM PREDICTION CENTER NORMAN OK
0835 PM CDT WED MAY 13 2009
AREAS AFFECTED...NERN MO/NRN AND CENTRAL IL
CONCERNING...TORNADO WATCH 293...
VALID 140135Z - 140300Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 293 CONTINUES.
SEVERE/ISOLATED TORNADO THREAT CONTINUES.
RADAR LOOP REVEALS BROKEN BANDS OF STORMS PROGRESSING EWD AHEAD OF
THE ADVANCING COLD FRONT...WHERE 500 TO 1500 J/KG MIXED-LAYER CAPE
PERSISTS PER OBJECTIVE ANALYSES. AN OVERALL/SLOW WEAKENING TREND
APPEARS TO HAVE BEGUN IN CONJUNCTION WITH SOME DIURNAL
STABILIZATION...BUT EXPECT ISOLATED STRONG/SEVERE STORMS TO
CONTINUE. STORMS MAY LINGER ACROSS WW 293 BEYOND THE SCHEDULED
14/03Z EXPIRATION -- WHICH COULD REQUIRE A LOCAL EXTENTION OF THE
WATCH...OTHERWISE MUCH OF THE CONVECTION WILL CONTINUE SHIFTING INTO
WW 294 OVER THE NEXT 1-2 HOURS.
..GOSS.. 05/14/2009
ATTN...WFO...LOT...ILX...MKX...LSX...DVN...EAX...
LAT...LON 39359282 39739295 40849119 42608987 42568769 40148761
39459006 39359282
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