

570 

WWUS20 KWNS 012029

SEL9

SPC WW 012029

IAZ000-KSZ000-MOZ000-NEZ000-020400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 319

NWS STORM PREDICTION CENTER NORMAN OK

330 PM CDT MON JUN 1 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN IOWA

       PARTS OF NORTHERN KANSAS

       PARTS OF NORTHERN MISSOURI

       PARTS OF SOUTHEASTERN NEBRASKA



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 330 PM UNTIL

1100 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES SOUTH

SOUTHWEST OF KEARNEY NEBRASKA TO 40 MILES NORTH NORTHEAST 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 318...



DISCUSSION...WARM SECTOR TO S OF FRONTAL BOUNDARY HAS BECOME VERY

WARM AND UNSTABLE.  WITH LITTLE REMAINING CINH...THUNDERSTORMS WILL

BE INCREASING IN NUMBER AND INTENSITY VICINITY AND LATER N OF

BOUNDARY.  WITH MARGINAL DEEP LAYER SHEAR PRIMARY THREAT WILL BE

LARGE HAIL AND DOWNBURST DAMAGING WINDS.



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 500. MEAN STORM

MOTION VECTOR 26020.





...HALES

