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000 

WWUS20 KWNS 051556

SEL1

SPC WW 051556

IAZ000-KSZ000-NEZ000-SDZ000-060000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 461

NWS STORM PREDICTION CENTER NORMAN OK

1055 AM CDT THU JUN 5 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN IOWA

       NORTH CENTRAL KANSAS

       CENTRAL AND EASTERN NEBRASKA

       EXTREME SOUTHEAST SOUTH DAKOTA



EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1055 AM UNTIL

700 PM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE HAIL TO 3 INCHES IN DIAMETER...

THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE

POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTH SOUTHWEST OF

BROKEN BOW NEBRASKA TO 25 MILES EAST SOUTHEAST OF DENISON IOWA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 458...WW 459...WW 460...



DISCUSSION...SCATTERED TO NUMEROUS SEVERE THUNDERSTORMS ARE EXPECTED

TO DEVELOP THROUGH THE EARLY-MID AFTERNOON HOURS ACROSS PORTIONS OF

EASTERN NEB...SPREADING INTO WESTERN IA AND SOUTHEAST SD.  STRONG

LOW LEVEL VERTICAL SHEAR PROFILES...AMPLE MOISTURE/INSTABILITY...AND

PRESENCE OF MULTIPLE SURFACE BOUNDARIES WILL POSE A RISK OF

SUPERCELLS CAPABLE OF STRONG TORNADOES.  VERY LARGE HAIL AND

DAMAGING WINDS WILL ALSO BE A CONCERN.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24040.





...HART

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