

000 

WWUS20 KWNS 061950

SEL6

SPC WW 061950

IAZ000-NEZ000-070300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 266

NWS STORM PREDICTION CENTER NORMAN OK

250 PM CDT TUE MAY 6 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN IOWA

       CENTRAL AND EASTERN NEBRASKA



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 250 PM UNTIL

1000 PM CDT.



HAIL TO 3 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 65

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 60 MILES NORTH

NORTHWEST OF IMPERIAL NEBRASKA TO 15 MILES NORTHEAST OF DENISON

IOWA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 265...



DISCUSSION...SCATTERED THUNDERSTORMS ARE EXPECTED TO INTENSIFY THIS

AFTERNOON OVER PARTS OF NEB IN REGION OF STRONG INSTABILITY AND

RATHER WEAK CAP.  THESE STORMS WILL LIKELY PRODUCE VERY LARGE HAIL

AND DAMAGING WINDS AS THEY TRACK EAST-SOUTHEASTWARD TOWARD WESTERN

IA.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 27030.





...HART

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