

090 

WWUS20 KWNS 100042

SEL8

SPC WW 100042

IAZ000-MNZ000-SDZ000-WIZ000-100800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 118

NWS STORM PREDICTION CENTER NORMAN OK

745 PM CDT SAT APR 9 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST IOWA

       SOUTHERN MINNESOTA

       SOUTHEAST SOUTH DAKOTA

       WESTERN WISCONSIN



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 745 PM

UNTIL 300 AM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 155

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES WEST

NORTHWEST OF MINNEAPOLIS MINNESOTA TO 20 MILES WEST SOUTHWEST OF

FAIRMONT MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 113...WW 115...WW

116...WW 117...



DISCUSSION...ELEVATED TSTMS/SUPERCELLS EXPECTED TO INCREASE IN

COVERAGE AND STRENGTH THROUGH EARLY SUN AS SSWLY LLJ STRENGTHENS

ATOP SLOWLY MOVING WARM FRONT.  AMPLE ELEVATED CAPE /PER 00Z MPX

SOUNDING/ TO SUPPORT VERY LARGE HAIL IN SUSTAINED UPDRAFTS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 24040.





...CORFIDI

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