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WWUS20 KWNS 041938

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IAZ000-NEZ000-050300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 539

NWS STORM PREDICTION CENTER NORMAN OK

240 PM CDT FRI OCT 4 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  WESTERN IOWA

  EASTERN NEBRASKA



* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 240 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL TORNADOES LIKELY WITH A FEW INTENSE TORNADOES POSSIBLE

  SEVERAL VERY LARGE HAIL EVENTS TO 3 INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 75

    MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES WEST OF FALLS CITY

NEBRASKA TO 35 MILES NORTHEAST OF NORFOLK NEBRASKA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU9).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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.



&&



DISCUSSION...THUNDERSTORMS ARE EXPECTED TO FORM THIS AFTERNOON

ALONG/AHEAD OF AN APPROACHING COLD FRONT OVER EASTERN NEB.  THOSE

STORMS WILL TRACK EAST-NORTHEASTWARD ACROSS THE WATCH AREA THROUGH

THIS EVENING.  SUPERCELLS CAPABLE OF VERY LARGE HAIL AND A FEW

TORNADOES ARE POSSIBLE.  LOCALLY DAMAGING WINDS ARE ALSO A CONCERN.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 25035.





...HART

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