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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 81

NWS STORM PREDICTION CENTER NORMAN OK

610 PM CDT SUN APR 10 2016



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  PARTS OF THE MIDDLE RIO GRANDE VALLEY AND SOUTHERN EDWARDS PLATEAU

OF TEXAS



* EFFECTIVE THIS SUNDAY NIGHT FROM 610 PM UNTIL MIDNIGHT CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



SUMMARY...ISOLATED THUNDERSTORMS ARE DEVELOPING WEST OF DEL RIO IN

AN ENVIRONMENT SUPPORTIVE OF SUPERCELLS.  THESE STORMS...AND NEW

STORMS TO THE WEST...WILL SPREAD EASTWARD ACROSS THE RIO GRANDE THIS

EVENING.  LARGE HAIL WILL BE THE MAIN THREAT...THOUGH DAMAGING WINDS

WILL BE POSSIBLE LATER IF STORMS GROW INTO A LARGER CLUSTER.

ALSO...AN ISOLATED TORNADO CANNOT BE RULED OUT WITH THE INITIAL

SUPERCELLS NEAR THE RIO GRANDE LATE THIS EVENING.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH

NORTHEAST OF DEL RIO TEXAS TO 110 MILES SOUTH SOUTHEAST OF DEL

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 78...WW 79...WW 80...



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.





...THOMPSON

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