WWUS20 KWNS 191411
SEL1
SPC WW 191411
MIZ000-LHZ000-LMZ000-LSZ000-191900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 411
NWS STORM PREDICTION CENTER NORMAN OK
915 AM CDT TUE JUN 19 2012

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

       NORTHERN LOWER MICHIGAN
       LAKE HURON
       LAKE MICHIGAN
       LAKE SUPERIOR

EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 915 AM UNTIL
200 PM CDT.

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 40
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES NORTHWEST
OF TRAVERSE CITY MICHIGAN TO 25 MILES EAST NORTHEAST OF ALPENA
MICHIGAN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

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 410...

DISCUSSION...A FAST MOVING BOW ECHO COMPLEX OVER NORTHERN LAKE MI
WILL TRACK RAPIDLY EASTWARD ACROSS NORTHERN LOWER MI DURING THE NEXT
FEW HOURS.  THIS LONG-LIVED SYSTEM HAS A HISTORY OF WIND DAMAGE. 
THE STORMS HAVE SHOWN SIGNS OF WEAKENING DURING THE PAST 1-2
HOURS...BUT A MOIST AND DESTABILIZING AIR MASS OVER THE WATCH AREA
MAY RESULT IN RE-INTENSIFICATION.

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 27040.


...HART