

484 

WWUS20 KWNS 011902

SEL2

SPC WW 011902

IAZ000-MNZ000-WIZ000-020200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 712

NWS STORM PREDICTION CENTER NORMAN OK

205 PM CDT MON AUG 1 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR NORTHEAST IOWA

       FAR SOUTHEAST MINNESOTA

       WESTERN WISCONSIN



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 205 PM UNTIL 900

PM 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 60

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

NORTHWEST OF ROCHESTER MINNESOTA TO 50 MILES EAST NORTHEAST OF LA

CROSSE WISCONSIN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 709...WW 710...WW 711...



DISCUSSION...BOWING MCS WITH A HISTORY OF PRODUCING DAMAGING WINDS

IS EXPECTED TO CONTINUE ESEWD ALONG IMMEDIATE COOL SIDE OF LOW-LEVEL

BAROCLINIC ZONE.  INFLUX OF A VERY TO EXTREMELY UNSTABLE AIR MASS

ALONG SWRN FLANK OF SYSTEM COUPLED WITH 40-50 KT OF DEEP NWLY SHEAR

WILL CONTINUE TO PROMOTE AN ENVIRONMENT SUPPORTIVE OF DAMAGING WINDS

AND LARGE HAIL.



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 28030.





...MEAD

