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867 

WWUS20 KWNS 231931

SEL0

SPC WW 231931

MNZ000-WIZ000-LSZ000-240100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 500

NWS STORM PREDICTION CENTER NORMAN OK

230 PM CDT TUE JUN 23 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST MINNESOTA INCLUDING THE ARROWHEAD

       FAR NORTHWEST WISCONSIN

       LAKE SUPERIOR



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 230 PM UNTIL

800 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 EAST AND WEST OF A LINE FROM 60 MILES SOUTHWEST OF

KENNEDY WISCONSIN TO 20 MILES NORTH OF ELY MINNESOTA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



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 497...WW 498...WW 499...



DISCUSSION...ISOLATED SEVERE STORMS...INCLUDING POSSIBLE

SUPERCELLS...EXPECTED TO SHIFT ENEWD ACROSS THIS REGION THROUGH THE

EVENING ASSOCIATED WITH WEAKENING SHORTWAVE TROUGH SKIRTING THE NRN

PLAINS.  AIR MASS WILL LIKELY REMAIN MARGINAL TO MODERATELY UNSTABLE

WITH SUFFICIENT DEEP LAYER SHEAR FOR SUSTAINED STORM-SCALE

ORGANIZATION.  ISOLATED LARGE HAIL AND DAMAGING WINDS MAY ACCOMPANY

THE MORE INTENSE STORMS.



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 25025.





...EVANS

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