Indy in middle of High Risk for Tornadoes
Posted by JAC on 5/25/2011, 12:40 pm
http://www.spc.noaa.gov/products/watch/ww0368.html




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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Mid MS-River Area under High-Risk for Severe Weather Today - JAC, 5/25/2011, 9:01 am
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