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083 

WWUS20 KWNS 191943

SEL0

SPC WW 191943

IAZ000-KSZ000-MOZ000-NEZ000-200100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 530

NWS STORM PREDICTION CENTER NORMAN OK

245 PM CDT THU SEP 19 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHERN IOWA

  EXTREME NORTHEAST KANSAS

  NORTHWEST MISSOURI

  SOUTHEAST NEBRASKA



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 245 PM UNTIL

  800 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

STATUTE MILES EAST AND WEST OF A LINE FROM 5 MILES SOUTHEAST OF

FALLS CITY NEBRASKA TO 40 MILES NORTH OF KNOXVILLE IOWA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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.



&&



DISCUSSION...THUNDERSTORMS HAVE DEVELOPED ALONG A BOUNDARY EXTENDING

FROM SOUTHEAST NEB INTO CENTRAL IA.  THESE STORMS ARE EXPECTED TO

MAINTAIN INTENSITY FOR SEVERAL HOURS AND TRACK EAST-NORTHEASTWARD

ACROSS THE WATCH AREA.  SUFFICIENT VERTICAL SHEAR AND INSTABILITY

WILL POSE A RISK OF DAMAGING WINDS AND HAIL IN THE STRONGEST STORMS.



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 25030.





...HART

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