May 22- Tornado Watch #327

URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 327
   NWS STORM PREDICTION CENTER NORMAN OK
   205 PM CDT SUN MAY 22 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          NORTHERN ILLINOIS
          NORTHWEST INDIANA
          CENTRAL AND EASTERN WISCONSIN
          LAKE MICHIGAN
   
   EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 205 PM UNTIL
   1000 PM CDT.
   
   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 45 MILES NORTHEAST OF WAUSAU
   WISCONSIN TO BLOOMINGTON ILLINOIS.  FOR A COMPLETE DEPICTION OF
   THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS
   WOU7).
   
   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 322...WW 323...WW
   324...WW 325...WW 326...
   
   DISCUSSION...TSTMS ARE EXPECTED TO MOVE INTO THE AREA FROM THE WEST
   AND SOUTH THIS AFTERNOON AS THE CONTINUED WARMING AND MOISTENING OF
   THE BOUNDARY LAYER SUPPORTS MLCAPE VALUES OF 1000-2000 J/KG.  18Z
   DVN/ILX SOUNDINGS SHOWED DEEP-LAYER SHEAR OF AROUND 40 KT AND
   EFFECTIVE SRH VALUES OF 150-200 M2/S2.  AS SUCH...THE POTENTIAL WILL
   EXIST FOR SUPERCELLS CAPABLE OF LARGE HAIL...DAMAGING WINDS AND
   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
   500. MEAN STORM MOTION VECTOR 24030.