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079 

WWUS20 KWNS 272301

SEL3

SPC WW 272301

MIZ000-WIZ000-LMZ000-LSZ000-280700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 543

NWS STORM PREDICTION CENTER NORMAN OK

600 PM CDT TUE JUL 27 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN MICHIGAN UPPER PENINSULA

       NORTHEAST WISCONSIN

       LAKE MICHIGAN

       LAKE SUPERIOR



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 600 PM

UNTIL 200 AM CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST NORTHWEST OF

RHINELANDER WISCONSIN TO 20 MILES EAST OF ESCANABA MICHIGAN.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 541...WW 542...



DISCUSSION...TSTMS SHOULD PROGRESSIVELY MOVE/DEVELOP EWD/SEWD ACROSS

AREA TONIGHT WITHIN STRENGTHENING LOW-LEVEL WAA ATTENDANT TO STRONG

MIDLEVEL TROUGH MOVING THROUGH THE UPPER MS VALLEY.  INCREASING LOW

AND DEEP-LAYER SHEAR COUPLED WITH THE NEWD FLUX OF AN INCREASINGLY

WARM/MOIST AIR MASS WILL RESULT IN AN ENVIRONMENT FAVORABLE FOR

SUPERCELLS CAPABLE OF TORNADOES...SOME HAIL AND DAMAGING WINDS.



AVIATION...TORNADOES AND 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

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