SWOMCD
SPC MCD 112259
MNZ000-IAZ000-MOZ000-KSZ000-NEZ000-SDZ000-120030-
MESOSCALE DISCUSSION 1327
NWS STORM PREDICTION CENTER NORMAN OK
0559 PM CDT WED JUN 11 2008
AREAS AFFECTED...EASTERN NEB/WESTERN IA/SOUTHWEST MN/NORTHWEST MO
CONCERNING...TORNADO WATCH 509...
VALID 112259Z - 120030Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 509 CONTINUES.
TORNADO WATCH 509 CONTINUES UNTIL 03Z...WITH A RISK OF
TORNADOES/LARGE HAIL AND DAMAGING WIND GUSTS.
ALTHOUGH TORNADOES ARE POSSIBLE WITH ANY SUPERCELLS IN TORNADO WATCH
509...THE GREATEST THREAT FOR TORNADOES /SOME POTENTIALLY STRONG/
OVER THE NEXT SEVERAL HOURS EXISTS FROM WEST CENTRAL IA INTO
SOUTHWEST MN. JUST AHEAD OF THE SYNOPTIC COLD FRONT...QUASI-DISCRETE
SUPERCELLS WITHIN THIS CORRIDOR WILL INTERACT WITH THE RESIDUAL
IMPRINT OF A NORTHWEST-SOUTHEAST ORIENTED OUTFLOW BOUNDARY DRAPED
ACROSS WESTERN/CENTRAL IA...AND/OR THE ROUGHLY WEST-EAST ORIENTED
SYNOPTIC WARM FRONT ACROSS FAR SOUTHERN MN. WITHIN THIS
WESTERN/NORTHERN IA INTO FAR SOUTHERN MN CORRIDOR...LOW LEVEL SHEAR
IS MAXIMIZED AMIDST SOMEWHAT BACKED LOW LEVEL SOUTHEASTERLY
FLOW...WITH 0-1 SRH VALUES OF 300-500 M2/S2 ESTIMATED PER SLATER
IA/WOOD LAKE MN PROFILERS. OTHERWISE...SEMI-DISCRETE SUPERCELLS WILL
CONTINUE TO INITIATE FROM NEAR/WEST OF THE OMAHA AREA INTO FAR
SOUTHEAST NEB/WESTERN IA OVER THE NEXT FEW HOURS. DOWNSTREAM AREAS
OF IA/MN WILL BE MONITORED FOR THE POSSIBILITY OF AN ADDITIONAL
WATCH OVER THE NEXT FEW HOURS.
..GUYER.. 06/11/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MPX...DMX...EAX...FSD...OAX...TOP...ABR...
44709690 44709443 43999365 40769412 39909531 40049712
41019712 42519659 43769652
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