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WWUS20 KWNS 090059

SEL9

SPC WW 090059

TXZ000-CWZ000-090800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 39

NWS STORM PREDICTION CENTER NORMAN OK

700 PM CST TUE MAR 8 2016



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTH CENTRAL AND DEEP SOUTH TEXAS

  COASTAL WATERS



* EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 700 PM

  UNTIL 200 AM CST.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



SUMMARY...THUNDERSTORMS WILL INCREASE IN COVERAGE AND INTENSITY

WHILE SPREADING NORTHEASTWARD FROM THE RIO GRANDE VALLEY INTO SOUTH

TEXAS OVERNIGHT.  THE STORM ENVIRONMENT WILL PRIMARILY FAVOR LARGE

HAIL AND DAMAGING WINDS WITH BOTH SUPERCELLS AND MERGING CLUSTERS OF

STORMS.  AN ISOLATED TORNADO MAY OCCUR...MAINLY LATER TONIGHT CLOSER

TO THE MIDDLE TEXAS COAST.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHWEST OF

NEW BRAUNFELS TEXAS TO 15 MILES WEST SOUTHWEST OF MCALLEN TEXAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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.



&&



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 24025.





...THOMPSON

