

000 

WWUS20 KWNS 150030

SEL1

SPC WW 150030

MNZ000-WIZ000-LSZ000-150600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 691

NWS STORM PREDICTION CENTER NORMAN OK

730 PM CDT MON JUL 14 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF NORTHERN MINNESOTA

       SMALL PART OF NORTHWEST WISCONSIN

       LAKE SUPERIOR



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 730 PM UNTIL

100 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 60 MILES SOUTHWEST

OF BEMIDJI MINNESOTA TO 50 MILES EAST NORTHEAST OF SILVER BAY

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 690...



DISCUSSION...THUNDERSTORMS CONTINUE TO INCREASE IN NUMBER AND

INTENSITY ALONG/AHEAD OF COLD FRONT NRN MN.  WITH 30-40 KT OF SHEAR

ALONG WITH STEEP LAPSE RATES AND MLCAPES AOA 1500 J/KG...STORMS WILL

HAVE POTENTIAL OF PRODUCING DAMAGING WINDS AND LARGE HAIL AS THEY

DEVELOP S OF E.



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.





...HALES

