

764 

WWUS20 KWNS 170605

SEL0

SPC WW 170605

KSZ000-OKZ000-171200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 320

NWS STORM PREDICTION CENTER NORMAN OK

105 AM CDT MON JUN 17 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTH-CENTRAL AND SOUTHEAST KANSAS

  OKLAHOMA



* EFFECTIVE THIS MONDAY MORNING FROM 105 AM UNTIL 700 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF

CHANUTE KANSAS TO 35 MILES SOUTH OF FORT SILL OKLAHOMA.  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 319...



DISCUSSION...A MATURE BOW ECHO HAS EVOLVED EARLY THIS MORNING ACROSS

S-CNTRL KS INTO NWRN OK WITH A FORWARD SYSTEM MOTION OF 35-40 KT.

RECENT VAD DATA FROM VANCE AFB INDICATE THAT A 50+ KT REAR INFLOW

JET IS PRESENT WHICH WILL COMBINE WITH A STRENGTHENING NOCTURNAL

LOW-LEVEL WIND MAXIMUM WITHIN THE INFLOW AIR MASS TO ENHANCE DEEP

CONVERGENCE ALONG THE SYSTEM COLD POOL.  THIS SHOULD SUPPORT THE

CONTINUED SEWD MOTION OF THE MCS WITH AN ATTENDANT RISK FOR MAINLY

DAMAGING WINDS.



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 550. MEAN STORM

MOTION VECTOR 29035.





...MEAD

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