

000 

WWUS20 KWNS 300621

SEL2

SPC WW 300621

IAZ000-ILZ000-MOZ000-301400-



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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