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WWUS20 KWNS 291731

SEL5

SPC WW 291731

INZ000-MIZ000-OHZ000-LEZ000-LHZ000-LMZ000-300000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 395

NWS STORM PREDICTION CENTER NORMAN OK

130 PM EDT SUN MAY 29 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN INDIANA

       SOUTHERN LOWER MICHIGAN

       NORTHWEST OHIO

       LAKE ERIE

       LAKE HURON

       LAKE MICHIGAN



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 130 PM UNTIL 800

PM EDT.



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

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 10 MILES NORTH NORTHWEST OF

VALPARAISO INDIANA TO 25 MILES EAST SOUTHEAST OF MOUNT CLEMENS

MICHIGAN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 394...



DISCUSSION...A FAST-MOVING BOW ECHO COMPLEX OVER NORTHERN IL WILL

TRACK RAPIDLY EASTWARD AT 45-50 KNOTS ACROSS THE WATCH AREA TODAY.

A WIDESPREAD DAMAGING WIND EVENT /DERECHO/ IS POSSIBLE.  RAPID

DESTABILIZATION HAS OCCURRED AHEAD OF THE BOW AS THE WARM FROM

RETREATS... SUGGESTING BOW MAY MAINTAIN INTENSITY FOR SEVERAL MORE

HOURS.  STRENGTHENING LOW LEVEL WINDS AND PROXIMITY OF WARM FRONT...

COUPLED WITH HIGH LEVEL OF MESOSCALE ORGANIZATION OF BOW SUPPORTS  A

THREAT OF QLCS TORNADOES ALONG THE BOW...AS WELL AS ISOLATED

SUPERCELLS AHEAD OF THE BOW.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 25045.





...HART

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