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Mesoscale Discussion 582 |
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MESOSCALE DISCUSSION 0582
NWS STORM PREDICTION CENTER NORMAN OK
0105 AM CDT TUE APR 30 2013
AREAS AFFECTED...N-CNTRL IA INTO SWRN WI
CONCERNING...SEVERE THUNDERSTORM WATCH 145...
VALID 300605Z - 300700Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 145
CONTINUES.
SUMMARY...AN OCCASIONAL MARGINALLY SEVERE HAIL THREAT SHOULD
CONTINUE FOR THE NEXT SEVERAL HOURS.
DISCUSSION...RADAR MOSAIC SHOWS A CLUSTER OF STORMS MOVING NEWD OVER
N-CNTRL IA. THESE STORMS SHOULD PERSIST INTO THE OVERNIGHT HOURS
OWING IN PART TO A 60 KT LLJ SAMPLED BY THE KDMX VWP. STEEP LAPSE
RATES AND DEEP LAYER SHEAR SUPPORTIVE OF STORM ORGANIZATION WILL
SUPPORT A PERSISTENT THREAT FOR MARGINALLY SEVERE HAIL FROM N-CNTRL
IA INTO SWRN WI.
CONVECTIVE TRENDS WILL BE MONITORED IN THE SHORTER TERM IF STORMS
CAN DEVELOP FARTHER SW OVER SWRN IA. IF THE CAP CONTINUES TO
HOLD...THIS AREA /INCLUDING THE DES MOINES METRO/ MAY BE DROPPED
FROM THE WATCH WITHIN THE NEXT 1-2 HRS.
..SMITH.. 04/30/2013
ATTN...WFO...MKX...DVN...ARX...DMX...
LAT...LON 42888997 42259195 42359365 42899383 43599051 43378998
43078986 42888997
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