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WWUS20 KWNS 082100

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IAZ000-KSZ000-MOZ000-NEZ000-090400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 289

NWS STORM PREDICTION CENTER NORMAN OK

400 PM CDT SAT JUN 8 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN IOWA

  NORTH CENTRAL AND NORTHEAST KANSAS

  FAR NORTHWEST MISSOURI

  SOUTH CENTRAL THROUGH EAST CENTRAL AND SOUTHEAST NEBRASKA



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 400 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHWEST OF

OMAHA NEBRASKA TO 30 MILES SOUTH SOUTHEAST OF CONCORDIA KANSAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 288...



DISCUSSION...TSTMS EXPECTED TO FORM IN ZONE OF DCVA/WAA AHEAD OF

AMPLIFYING...DIFFLUENT UPR TROUGH NOW OVER CNTRL NEB. WHILE BOUNDARY

LAYER BUOYANCY WILL REMAIN LIMITED...COMBINATION OF WIND PROFILES

AND DEEP FORCING FOR ASCENT WILL BE FAVORABLE FOR SUSTAINED

STORMS/SUPERCELLS. THESE MAY YIELD LOCALLY DMGG WIND...MARGINALLY

SVR HAIL. A COUPLE TORNADOES ALSO MAY OCCUR GIVEN SIZABLE LOW-LVL

DIRECTIONAL SHEAR /ESPECIALLY NEAR WEAK WNW-ESE FRONT IN ERN NEB/.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 26030.





...CORFIDI

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