

296 

WWUS20 KWNS 131857

SEL4

SPC WW 131857

OKZ000-TXZ000-140100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 74

NWS STORM PREDICTION CENTER NORMAN OK

200 PM CDT SUN APR 13 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  CENTRAL AND EASTERN OKLAHOMA

  NORTH TEXAS



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 200 PM UNTIL

  800 PM CDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS

    TO 2.5 INCHES IN DIAMETER POSSIBLE

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF

BARTLESVILLE OKLAHOMA TO 60 MILES WEST SOUTHWEST OF SHERMAN

TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 73...



DISCUSSION...THUNDERSTORMS ARE BEGINNING TO FORM ALONG THE COLD

FRONT IN NORTH CENTRAL OK...AND WILL SOON FORM ALONG THE DRYLINE

SOUTHWARD INTO NORTH TX.  STRONG INSTABILITY WILL PROMOTE SUPERCELL

STRUCTURES WITH DRYLINE STORMS...CAPABLE OF VERY LARGE HAIL AND

DAMAGING WINDS.  THE TORNADO THREAT APPEARS GREATEST LATE THIS

AFTERNOON AND EVENING OVER SOUTHEAST OK...WHERE STRONGEST LOW LEVEL

SHEAR AND BOUNDARY LAYER MOISTURE WILL BE PRESENT.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 26030.





...HART

