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WWUS20 KWNS 212057

SEL3

SPC WW 212057

MIZ000-LMZ000-220300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 533

NWS STORM PREDICTION CENTER NORMAN OK

400 PM CDT TUE JUN 21 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       LARGE PART OF LOWER MICHIGAN

       LAKE MICHIGAN



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 400 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 2.5 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 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES EAST SOUTHEAST OF

KALAMAZOO MICHIGAN TO 25 MILES WEST NORTHWEST OF HOUGHTON LAKE

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 531...WW 532...



DISCUSSION...WITH A VERY UNSTABLE AIR MASS IN PLACE COUPLED WITH AN

E/W WARM FRONT CONDITIONS APPEARS FAVORABLE FOR SUPERCELLS INCLUDING

ISOLATED TORNADOS.  INITIAL STORMS DEVELOPING ALONG LAKE BREEZE WRN

MI AND SHOULD EXPAND N AND E THRU THE AFTERNOON/EVENING.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 20025.





...HALES

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