

478 

WWUS20 KWNS 110119

SEL5

SPC WW 110119

MIZ000-LHZ000-LMZ000-LSZ000-110600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 125

NWS STORM PREDICTION CENTER NORMAN OK

920 PM EDT SUN APR 10 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN UPPER MICHIGAN

       LAKE HURON

       LAKE MICHIGAN

       LAKE SUPERIOR



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 920 PM UNTIL

200 AM EDT.



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

GUSTS TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES EAST SOUTHEAST OF

ESCANABA MICHIGAN TO 70 MILES EAST NORTHEAST OF MARQUETTE

MICHIGAN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 120...WW 121...WW

122...WW 123...WW 124...



DISCUSSION...SUSTAINED SUPERCELLS OVER NRN AND ERN WI EXPECTED TO

CONTINUE RAPIDLY ENE ACROSS CNTRL AND PERHAPS ERN PARTS OF THE UPR

PENINSULA OF MI.  WHILE NEAR-SFC LAYER IS RELATIVELY STABLE GIVEN

FLOW OFF THE LAKES...KGRB SOUNDING AND VWP DATA SUGGEST

SHEAR/INSTABILITY ENVIRONMENT IMMEDIATELY ABOVE THE SFC COULD

SUPPORT SUSTENANCE OF EXISTING LOW-LVL MESOCYCLONES AND POSSIBLE

TORNADOES THAT MOVE INTO REGION FROM THE WSW.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

450. MEAN STORM MOTION VECTOR 26050.





...CORFIDI

