

567 

WWUS20 KWNS 100204

SEL9

SPC WW 100204

MNZ000-100900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 569

NWS STORM PREDICTION CENTER NORMAN OK

905 PM CDT THU JUL 9 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN MINNESOTA



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 905 PM

UNTIL 400 AM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 35

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES NORTH OF

WORTHINGTON MINNESOTA TO 50 MILES EAST SOUTHEAST OF MANKATO

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 568...



DISCUSSION...A CLUSTER OF SEVERE THUNDERSTORMS WILL DEVELOP EASTWARD

ACROSS SOUTHERN MN FOR THE NEXT SEVERAL HOURS...IN REGION OF

MODERATE ELEVATED CAPE AND STRONG VERTICAL SHEAR.  LARGE HAIL IS THE

MAIN THREAT WITH THIS ACTIVITY...ALTHOUGH SOME POTENTIAL ALSO EXISTS

FOR LOCALLY DAMAGING WINDS.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 26030.





...HART

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