

600 

WWUS20 KWNS 092308

SEL8

SPC WW 092308

MIZ000-LEZ000-100300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 48

NWS STORM PREDICTION CENTER NORMAN OK

710 PM EDT THU APR 9 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  SOUTHEAST LOWER MICHIGAN

  LAKE ERIE



* EFFECTIVE THIS THURSDAY EVENING FROM 710 PM UNTIL 1100 PM EDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF ANN ARBOR

MICHIGAN TO 20 MILES SOUTH OF MOUNT CLEMENS MICHIGAN.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 39...WW 40...WW 41...WW

42...WW 43...WW 44...WW 45...WW 46...WW 47...



DISCUSSION...SEVERAL SMALL SUPERCELL STORMS HAVE FORMED ALONG THE

WARM FRONT OVER LOWER MI.  STRONG LOW LEVEL VERTICAL SHEAR AND

MARGINAL INSTABILITY WILL POSE A RISK OF HAIL...DAMAGING WINDS...OR

PERHAPS A TORNADO OR TWO FROM THESE STORMS THIS EVENING.



AVIATION...TORNADOES AND 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

450. MEAN STORM MOTION VECTOR 27035.





...HART



218 

WWUS20 KWNS 092308

SEL8

SPC WW 092308

MIZ000-LEZ000-100300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 48

NWS STORM PREDICTION CENTER NORMAN OK

710 PM EDT THU APR 9 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  SOUTHEAST LOWER MICHIGAN

  LAKE ERIE



* EFFECTIVE THIS THURSDAY EVENING FROM 710 PM UNTIL 1100 PM EDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF ANN ARBOR

MICHIGAN TO 20 MILES SOUTH OF MOUNT CLEMENS MICHIGAN.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 39...WW 40...WW 41...WW

42...WW 43...WW 44...WW 45...WW 46...WW 47...



DISCUSSION...SEVERAL SMALL SUPERCELL STORMS HAVE FORMED ALONG THE

WARM FRONT OVER LOWER MI.  STRONG LOW LEVEL VERTICAL SHEAR AND

MARGINAL INSTABILITY WILL POSE A RISK OF HAIL...DAMAGING WINDS...OR

PERHAPS A TORNADO OR TWO FROM THESE STORMS THIS EVENING.



AVIATION...TORNADOES AND 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

450. MEAN STORM MOTION VECTOR 27035.





...HART

