

828 

WWUS20 KWNS 301923

SEL0

SPC WW 301923

KSZ000-OKZ000-310300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 550

NWS STORM PREDICTION CENTER NORMAN OK

215 PM CDT WED OCT 30 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHERN AND EASTERN KANSAS

  WESTERN AND NORTHERN OKLAHOMA



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 215 PM

  UNTIL 1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  NUMEROUS LARGE HAIL EVENTS LIKELY WITH SEVERAL VERY LARGE HAIL

    EVENTS TO 3 INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS LIKELY WITH A FEW SIGNIFICANT GUSTS

    TO 80 MPH POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST

NORTHWEST OF CLINTON OKLAHOMA TO 40 MILES NORTH NORTHEAST OF

CHANUTE KANSAS.  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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 549...



DISCUSSION...TSTMS ARE JUST BEGINNING TO FORM ALONG SHALLOW SW-NE

STNRY/COLD FRONT OVER NW OK/S CNTRL-E CNTRL KS. THIS BOUNDARY LIKELY

WILL CONTINUE TO FOCUS LOW-LVL UPLIFT/STORM DEVELOPMENT THROUGH

MID-EVE. WHILE INITIAL ACTIVITY WILL BE LARGELY

DIURNALLY-DRIVEN...LARGE-SCALE ASCENT MAY INCREASE OVER TIME BY

CONTINUED NEWD ADVANCE OF DISTURBANCES NOW IN NM/CO IN FAST /120 KT

AT 250 MB/ SW FLOW ALOFT.

WHILE DEEP/STRONG UNIDIRECTIONAL WIND FIELD ABOVE THE LOWEST LAYERS

APPEARS MOST FAVORABLE FOR LARGE TO VERY LARGE HAIL...THE

ENVIRONMENT ALSO COULD POSE A RISK FOR TORNADOES...ESPECIALLY OVER S

CNTRL KS AND NW/N CNTRL OK. CONDITIONS WILL CONTINUE TO BE

MONITORED. IF IT APPEARS THAT STORMS ALSO WILL ARISE AWAY FROM

LINEAR FORCING OF THE FRONT...PARTS OF KS AND OK MAY REQUIRE UPGRADE

TO A TORNADO WW LATER THIS AFTN OR EVE.



AVIATION...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 550. MEAN STORM

MOTION VECTOR 25035.





...CORFIDI

