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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 78

NWS STORM PREDICTION CENTER NORMAN OK

335 PM CDT MON APR 1 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR SOUTHWEST OKLAHOMA

       WESTERN AND NORTHWEST TEXAS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 335 PM UNTIL 900

PM CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH

NORTHWEST OF CHILDRESS TEXAS TO 85 MILES SOUTH SOUTHEAST OF

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...TSTMS NOW FORMING NEAR INTERSECTION OF DIFFUSE S-N DRY

LINE AND W-E BOUNDARY S OF SLOWLY-MOVING TX PANHANDLE COLD FRONT

EXPECTED TO GROW IN NUMBER AND STRENGTH WITH CONTINUED SFC HEATING.

WHILE LOW-LVL MOISTURE IS LIMITED...LOW TO MID-LVL LAPSE RATES ARE

QUITE STEEP...AND MID-LVL MOISTURE IS PRESENT IN ASSOCIATION WITH

SRN STREAM JET. COUPLED WITH 40-50 KT WNWLY DEEP SHEAR...THIS SETUP

MAY YIELD A FEW SUSTAINED STORMS/SUPERCELLS WITH SVR HAIL/LOCALLY

DMGG WIND...AND POSSIBLY UPSCALE EVOLUTION INTO A SMALL MCS.



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 450. MEAN STORM

MOTION VECTOR 26025.





...CORFIDI

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