WATCHES: Severe Thunderstorm Watch Number 439

WWUS20 KWNS 081753
SEL9
SPC WW 081753
MIZ000-LHZ000-LMZ000-082100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 439
NWS STORM PREDICTION CENTER NORMAN OK
155 PM EDT WED JUN 8 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

NORTHERN LOWER MICHIGAN
LAKE HURON
LAKE MICHIGAN

EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 155 PM UNTIL 500 PM EDT.

HAIL TO 1.5 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 60
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF
ALPENA MICHIGAN TO 35 MILES EAST SOUTHEAST OF TRAVERSE CITY
MICHIGAN. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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.

DISCUSSION...FAST MOVING LINE OF STORMS WILL SHIFT EWD THROUGH
NORTHERN LOWER MI THE NEXT FEW HOURS. THE STORMS APPEAR TO BE
SLIGHTLY ELEVATED ...BUT THE RAPID MOTION OF THE STORMS AND WARMING
BOUNDARY LAYER MAY BE SUFFICIENT FOR SEVERE WINDS TO REACH THE
SURFACE. HAIL IS ALSO POSSIBLE.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 26035.

...IMY

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