

000 

WWUS20 KWNS 031218

SEL3

SPC WW 031218

IAZ000-ILZ000-MOZ000-032000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 433

NWS STORM PREDICTION CENTER NORMAN OK

715 AM CDT TUE JUN 3 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN IOWA

       NORTHWESTERN AND EXTREME WEST-CENTRAL ILLINOIS

       EXTREME NORTHEASTERN MISSOURI



EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 715 AM UNTIL

300 PM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EITHER SIDE OF A LINE FROM 50 MILES SOUTH SOUTHWEST

OF CEDAR RAPIDS IOWA TO 30 MILES NORTH NORTHEAST OF PEORIA

ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 431...WW 432...



DISCUSSION...ERN/NRN PORTION OF WELL ORGANIZED MCS -- INITIALLY IN

WW 432 -- EXPECTED TO MOVE ESEWD INTO NEW WW AREA.  FAVORABLE

AMBIENT SHEAR PROFILES WILL SUPPORT POTENTIAL FOR LARGE HAIL

ANYWHERE WITHIN WW AREA.  AIRMASS FCST TO DESTABILIZE WITH SWD

EXTENT IN CLOSER PROXIMITY TO NEARLY SFC-BASED EFFECTIVE INFLOW

PARCELS...INCREASING DAMAGING WIND THREAT AS WELL.



AVIATION...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 550. MEAN STORM

MOTION VECTOR 26030.





...EDWARDS/CORFIDI

