

419 

WWUS20 KWNS 122336

SEL4

SPC WW 122336

MIZ000-OHZ000-LEZ000-LHZ000-130700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 74

NWS STORM PREDICTION CENTER NORMAN OK

735 PM EDT MON MAR 12 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN LOWER MICHIGAN

       NORTHWEST OHIO

       LAKE ERIE

       LAKE HURON



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 735 PM UNTIL

300 AM EDT.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

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

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHEAST OF

BAD AXE MICHIGAN TO 25 MILES SOUTH SOUTHWEST OF TOLEDO OHIO.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 73...



DISCUSSION...MIGRATORY SHORT-WAVE TROUGH WILL PROGRESS ACROSS THE

WATCH AREA TONIGHT...FOCUSING A BAND OF TSTMS ALONG AND AHEAD OF

ATTENDANT SURFACE COLD FRONT.  THOUGH INSTABILITY WILL REMAIN QUITE

MARGINAL...THE DEGREE OF FORCING FOR ASCENT AND RATHER STRONG LOW-

AND DEEP-LAYER SHEAR WILL MAINTAIN A RISK FOR EMBEDDED SUPERCELL

AND/OR BOWING STRUCTURES CAPABLE OF DAMAGING WINDS AND PERHAPS A

COUPLE OF TORNADOES.



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

350. MEAN STORM MOTION VECTOR 23040.





...MEAD

