

613 

WWUS20 KWNS 200444

SEL9

SPC WW 200444

IAZ000-ILZ000-MOZ000-201100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 519

NWS STORM PREDICTION CENTER NORMAN OK

1140 PM CDT SUN JUN 19 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN IOWA

       WESTERN ILLINOIS

       NORTHEAST MISSOURI



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1140 PM UNTIL

600 AM 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 80

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH OF

MOLINE ILLINOIS TO 30 MILES SOUTH OF BURLINGTON IOWA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU9).



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 515...WW 516...WW

517...WW 518...



DISCUSSION...TSTMS EXPECTED TO MOVE/DEVELOP NEWD INTO WW AREA

THROUGH EARLY MON AS WAA/MOISTURE TRANSPORT INCREASE DOWNSTREAM FROM

HIGH AMPLITUDE TROUGH ENTERING THE CNTRL RCKYS.  QUALITY OF MOISTURE

INFLOW AND PRESENCE OF EML SUGGEST GOOD CHANCE FOR SVR HAIL/LOCALLY

DMGG WIND...ESPECIALLY DURING EARLY STAGES OF STORM DEVELOPMENT.  AN

ISOLD TORNADO CANNOT BE RULED OUT WITH STORMS IN SRN FRINGE OF

WW...ALTHOUGH THREAT APPEARS TOO LOW TO WARRANT A TORNADO WATCH

ATTM.



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 22030.





...CORFIDI

