

000 

WWUS20 KWNS 171715

SEL7

SPC WW 171715

MIZ000-MNZ000-WIZ000-LMZ000-LSZ000-180000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 697

NWS STORM PREDICTION CENTER NORMAN OK

1215 PM CDT THU JUL 17 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN U.P. OF MICHIGAN

       FAR NORTHEAST MINNESOTA

       NORTHERN AND CENTRAL WISCONSIN

       LAKE MICHIGAN

       LAKE SUPERIOR



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1215 PM UNTIL

700 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 80

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF

IRONWOOD MICHIGAN TO 10 MILES WEST OF OSHKOSH WISCONSIN.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



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 696...



DISCUSSION...SEVERE THUNDERSTORM THREAT WILL INCREASE THROUGH THE

AFTERNOON ACROSS THE REGION AS AIR MASS BECOMES VERY UNSTABLE.  DEEP

LAYER SHEAR FROM 30-40 KT WILL BE MORE THAN SUFFICIENT FOR

ORGANIZATION INTO LINES/SUPERCELLS...WITH POTENTIAL FOR A MORE

ORGANIZED SEVERE MCS DEVELOPING ACROSS NRN/CENTRAL WI AND INTO THE

WRN UP OF MI LATER TODAY.  LARGE HAIL AND DAMAGING WINDS CAN BE

EXPECTED WITH 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 26030.





...EVANS

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