WWUS20 KWNS 082222
SEL3
SPC WW 082222
MIZ000-LHZ000-LMZ000-LSZ000-090700-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 493
NWS STORM PREDICTION CENTER NORMAN OK
625 PM EDT SUN JUL 8 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN LOWER AND EASTERN UPPER MICHIGAN
LAKE HURON
LAKE MICHIGAN
LAKE SUPERIOR
EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 625 PM UNTIL
300 AM EDT.
HAIL TO 2 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 85
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES NORTHWEST
OF TRAVERSE CITY MICHIGAN TO 25 MILES NORTHEAST OF ALPENA
MICHIGAN. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
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.
OTHER WATCH INFORMATION...CONTINUE...WW 492...
DISCUSSION...SCATTERED INTENSE THUNDERSTORMS ARE OCCURRING OVER
NORTHERN WI AND WESTERN UPPER MI. THESE STORMS WILL PROGRESS
EASTWARD ACROSS LAKE MI AND INTO NORTHERN LOWER MI DURING THE NEXT
FEW HOURS. STRONG INSTABILITY AND FAVORABLE DEEP LAYER VERTICAL
SHEAR WILL PROMOTE A RISK OF ORGANIZED CLUSTERS OF SEVERE STORMS
CAPABLE OF DAMAGING WINDS AND LARGE HAIL.
AVIATION...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 27030.
..HART
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