

864 

WWUS20 KWNS 231843

SEL3

SPC WW 231843

OKZ000-TXZ000-240300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 213

NWS STORM PREDICTION CENTER NORMAN OK

140 PM CDT THU MAY 23 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  WESTERN OKLAHOMA

  NORTHWESTERN TEXAS



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 140 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL TORNADOES POSSIBLE

  NUMEROUS LARGE HAIL EVENTS LIKELY WITH A FEW VERY LARGE HAIL

    EVENTS TO 3 INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 80

    MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHWEST OF

BORGER TEXAS TO 90 MILES WEST OF ABILENE TEXAS.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU3).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



&&



DISCUSSION...STORMS ARE INITIATING NEAR WEAK DEVELOPING FRONTAL

WAVE...NEAR THE INTERSECTION OF A CONVECTIVELY GENERATED SURFACE

BOUNDARY AND GRADUALLY SHARPENING DRYLINE.  RAPID FURTHER INTENSE

THUNDERSTORM DEVELOPMENT IS LIKELY DURING THE NEXT FEW HOURS...IN

THE PRESENCE OF VERY STEEP MID-LEVEL LAPSE RATES...LARGE CAPE...AND

SUFFICIENT SHEAR FOR SUPERCELLS.  BEFORE STORMS BEGIN TO CONSOLIDATE

WITH UPSCALE CONVECTIVE GROWTH LATER THIS AFTERNOON AND EVENING...A

FEW SUPERCELLS ARE PROBABLE...SOME CAPABLE OF PRODUCING VERY LARGE

HAIL AND TORNADOES.



AVIATION...TORNADOES AND 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

600. MEAN STORM MOTION VECTOR 29015.





...KERR

