WATCHES: Severe Thunderstorm Watch Number 160

WWUS20 KWNS 152035
SEL0
SPC WW 152035
OKZ000-TXZ000-160500-

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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