

016 

WWUS20 KWNS 172131

SEL3

SPC WW 172131

MNZ000-WIZ000-LSZ000-180500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 653

NWS STORM PREDICTION CENTER NORMAN OK

435 PM CDT SUN JUL 17 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST MINNESOTA

       NORTHWEST WISCONSIN

       LAKE SUPERIOR



EFFECTIVE THIS SUNDAY AFTERNOON FROM 435 PM UNTIL MIDNIGHT 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 110

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH OF ELY

MINNESOTA TO 60 MILES SOUTHEAST OF BRAINERD MINNESOTA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



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 650...WW 652...



DISCUSSION...SCATTERED THUNDERSTORMS ARE MOVING ACROSS NORTHERN

MN...WHILE ISOLATED INTENSE SUPERCELLS TRACK ACROSS EASTERN ND.

BOTH AREAS OF CONVECTION WILL EVENTUALLY SPREAD ACROSS PORTIONS OF

THE WATCH AREA THIS EVENING.  A VERY MOIST AND EXTREMELY UNSTABLE

AIR MASS IS IN PLACE ACROSS THIS REGION...SUPPORTIVE OF SUPERCELLS

AND BOWS PRODUCING DAMAGING WINDS AND 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.





...HART

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