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022 

WWUS20 KWNS 251349

SEL8

SPC WW 251349

INZ000-MIZ000-LMZ000-252300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 368

NWS STORM PREDICTION CENTER NORMAN OK

950 AM EDT WED MAY 25 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       INDIANA

       SOUTHWEST LOWER MICHIGAN

       LAKE MICHIGAN



EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 950 AM UNTIL

700 PM EDT.



TORNADOES...HAIL TO 2 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 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHEAST OF SOUTH

BEND INDIANA TO 30 MILES SOUTH OF BLOOMINGTON INDIANA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



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 367...



DISCUSSION...BAND OF STRONG-SEVERE STORMS OVER ERN IL WILL PROGRESS

EWD/NEWD INTO IND THIS MORNING IN ADVANCE OF STRONG MIDLEVEL IMPULSE

LIFTING NNEWD THROUGH THE MID MS VALLEY.  12Z SOUNDING DATA AND

CURRENT SURFACE OBSERVATIONS SUGGEST THAT AIR MASS SHOULD RAPIDLY

DESTABILIZE WITH MLCAPE INCREASING TO 1000-2000 J/KG.  WHEN COUPLED

WITH STRENGTHENING VERTICAL SHEAR THROUGH THE DAY...ENVIRONMENT WILL

SUPPORT SUPERCELL AND BOWING STRUCTURES WITH A RISK FOR

TORNADOES...SOME POTENTIALLY STRONG...DAMAGING WINDS AND LARGE HAIL.



AVIATION...TORNADOES AND 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 24035.





...MEAD

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