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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 160

NWS STORM PREDICTION CENTER NORMAN OK

330 PM CDT WED MAY 15 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHERN OKLAHOMA

  NORTHWEST TEXAS



* EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 330 PM UNTIL MIDNIGHT

  CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL 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 80

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 90 MILES WEST

NORTHWEST OF ABILENE TEXAS TO 15 MILES EAST SOUTHEAST OF DURANT

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.



&&



DISCUSSION...COMPLEX STORM EVOLUTION ANTICIPATED THROUGH THE EVENING

AS LIFT AND SHEAR ASSOCIATED WITH AND UPPER LOW FORMING OVER CENTRAL

OK ACT ON VERY UNSTABLE AIRMASS AHEAD OF TX DRYLINE AND ALONG/SOUTH

OF RED RIVER WARM FRONT. CURRENT CLUSTERS OF STORMS DEVELOPING

ACROSS THE WARM FRONT IN SCNTRL OK WILL CONTINUE TO POSE A

MARGINALLY SEVERE HAIL THREAT WITH STORM INTERACTIONS/MERGERS

POSSIBLY RESULTING IN BRIEFLY STRONGER UPDRAFTS AND A LOW CHANCE FOR

DAMAGING WINDS AND EVEN A TORNADO. WITH TIME FOCUS SHOULD SHIFT

SOUTH AND WEST AS SHEAR AND LIFT STRENGTHEN SOUTH OF THE MID/UPPER

LOW. PROXIMITY TO STRONGER INSTABILITY ACROSS THIS PORTION OF THE

WATCH SHOULD SUPPORT ROBUST UPDRAFTS AND POSSIBLY A FEW SUPERCELLS

WITH LARGE HAIL AND HIGH WINDS. EVENTUALLY SOME OF THIS ACTIVITY

WILL MERGE INTO ONE OR TWO CONVECTIVE SYSTEMS AND SPREAD ESEWD

ACROSS THE INSTABILITY AXIS THROUGH THE EVENING. TORNADO POTENTIAL

MAY INCREASE IF CONVECTION REMAINS DISCRETE AND INTERACTS WITH

RESIDUAL STORM-SCALE/MESOSCALE BOUNDARIES DURING THE EVENING. IF

THIS POTENTIAL BECOMES EVIDENT...PARTS OF THE REGION MAY NEED TO BE

UPGRADED TO A TORNADO WATCH.



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 27025.





...CARBIN

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