

913 

WWUS20 KWNS 060258

SEL9

SPC WW 060258

MIZ000-060900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 269

NWS STORM PREDICTION CENTER NORMAN OK

1100 PM EDT SAT JUN 5 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN LOWER MICHIGAN



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1100 PM

UNTIL 500 AM EDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

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



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 30 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST OF KALAMAZOO

MICHIGAN TO 15 MILES EAST NORTHEAST OF DETROIT MICHIGAN.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU9).



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 266...WW 267...WW 268...



DISCUSSION...SUPERCELL/TORNADO THREAT WILL CONTINUE WITH STORMS

MOVING ALONG THE WARM FRONT...EAST OF THE SURFACE LOW DEVELOPING EWD

FROM NE IL.  THOUGH INSTABILITY WEAKENS QUICKLY WITH NWD EXTENT

ACROSS LOWER MI...LOW-LEVEL SHEAR IS MAXIMIZED ALONG THE WARM FRONT

IN A MOIST ENVIRONMENT WITH STRONG DEEP-LAYER SHEAR.



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

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.

MEAN STORM MOTION VECTOR 27035.





...THOMPSON

