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Tornado Watch 392
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WW0392 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL2
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 392
   NWS STORM PREDICTION CENTER NORMAN OK
   120 AM CDT FRI MAY 30 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          EASTERN IOWA
          WESTERN ILLINOIS
          NORTHEAST MISSOURI
   
   EFFECTIVE THIS FRIDAY MORNING FROM 120 AM UNTIL 900 AM CDT.
   
   TORNADOES...HAIL TO 1.5 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 50 STATUTE
   MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHEAST OF CEDAR
   RAPIDS IOWA TO 50 MILES SOUTHWEST OF BURLINGTON IOWA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU2).
   
   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 388...WW 389...WW
   390...WW 391...
   
   DISCUSSION...TSTM CLUSTERS WITH EMBEDDED SUPERCELLS EXPECTED TO
   CONTINUE FAIRLY RAPIDLY ENE INTO ERN IA LATER THIS MORNING AS 50 KT
   SWLY LLJ OVER MO/IA CONTINUES TO SHIFT SLOWLY EWD AND VEERS.  WHILE
   LOW-LEVEL DESTABILIZATION ACROSS WW AREA WILL OCCUR ONLY
   SLOWLY...COMBINATION OF EXISTING SUSTAINED/ROTATING STORMS WITH
   EXPECTED SHEAR PROFILES SUGGESTS POSSIBILITY FOR ISOLD
   TORNADOES...IN ADDITION TO BOWING SEGMENTS WITH HIGH WIND/MARGINALLY
   SVR HAIL...DESPITE WEAK SFC-BASED CAPE.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   500. MEAN STORM MOTION VECTOR 26040.
   
   
   ...CORFIDI
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Page last modified: May 30, 2008
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