April 26: Tornado Watch #1

URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 216
   NWS STORM PREDICTION CENTER NORMAN OK
   305 PM EDT TUE APR 26 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          EASTERN ILLINOIS
          NORTHERN AND CENTRAL INDIANA
          MUCH OF LOWER MICHIGAN
          NORTHWEST OHIO
          LAKE ERIE
          LAKE HURON
          LAKE MICHIGAN
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 305 PM UNTIL
   1000 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 90 STATUTE
   MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF BAD AXE
   MICHIGAN TO 20 MILES SOUTHWEST OF INDIANAPOLIS INDIANA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU6).
   
   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 213...WW 214...WW 215...
   
   DISCUSSION...AS A SURFACE LOW CONTINUES TO DEVELOP NORTHEASTWARD
   TOWARD LAKE MICHIGAN...RELATIVELY LOW TOPPED STORMS ARE EXPECTED TO
   INCREASE THROUGH THE AFTERNOON AHEAD OF A COLD FRONT. AS THE AIRMASS
   CONTINUES TO GRADUALLY DESTABILIZE...STRONG SOUTHWESTERLY DEEP
   TROPOSPHERIC FLOW WILL SUPPORT THE DEVELOPMENT OF SOME
   SUPERCELLS/ORGANIZED LINEAR CLUSTERS CAPABLE OF DAMAGING
   WINDS...SEVERE HAIL...AND A FEW TORNADOES.
   
   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
   400. MEAN STORM MOTION VECTOR 24040.