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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 493

NWS STORM PREDICTION CENTER NORMAN OK

350 PM CDT THU AUG 15 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  KANSAS

  SOUTHWEST NEBRASKA



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 350 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL VERY LARGE HAIL EVENTS TO 3 INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTH

SOUTHWEST OF GOODLAND KANSAS TO 25 MILES EAST SOUTHEAST OF

MANHATTAN KANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 492...



DISCUSSION...SEVERE STORM POTENTIAL SHOULD INCREASE INTO THE EVENING

OVER A NUMBER OF AREAS FROM EXTREME SRN NEB ACROSS MUCH OF KS.

MODERATE INSTABILITY AND AN AMPLIFYING MID/UPPER TROUGH WILL SUPPORT

AN INCREASE IN LARGE HAIL AND HIGH WIND FROM STORMS ASSOCIATED WITH

1) AN MCV DRIFTING SLOWLY EAST INTO NERN KS...2) THE TRAILING EDGE

OF THE MCV WHERE WARM ADVECTION CONTINUES TO SUPPORT CONVECTION IN A

VERY STEEP LAPSE RATE ENVIRONMENT ACROSS WRN KS...AND 3) ALONG SFC

TROUGH AXIS AHEAD OF A SHORTWAVE TROUGH ADVANCING TOWARD WRN NEB.

ALL THESE AREAS WILL SEE SOME CHANCE FOR LARGE HAIL IN THE

SHORT-TERM. STORMS DEVELOPING IN RESPONSE TO THE NEB SHORTWAVE ARE

LIKELY TO CONSOLIDATE INTO AN MCS LATER TONIGHT AND THEN SPREAD

SOUTH ACROSS THE REMAINDER OF WRN/CNTRL KS POSING A CONTINUING

CHANCE FOR DAMAGING WINDS.



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 500. MEAN STORM

MOTION VECTOR 34030.





...CARBIN

