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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 284

NWS STORM PREDICTION CENTER NORMAN OK

230 PM CDT THU JUN 6 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EAST CENTRAL AND SOUTHEAST TEXAS

  COASTAL WATERS



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 230 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EITHER SIDE OF A LINE FROM 45 MILES NORTHWEST OF

HUNTSVILLE TEXAS TO 20 MILES SOUTHEAST OF GALVESTON TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



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 283...



DISCUSSION...STORMS ARE INCREASING OVER EAST CENTRAL TX NEAR THE

INTERSECTION OF AN OUTFLOW BOUNDARY ARCING NW/SE ACROSS ERN TX AND A

WEAK COLD FRONT MOVING EWD.  ACTIVITY IS IN THE SRN PORTION OF A

VORTICITY MAX MOVING EWD TOWARD NERN TX.  STRONGER WNWLY WINDS ALOFT

TO THE SOUTH OF THE VORTICITY MAX ARE CONTRIBUTING TO 30-40 KT DEEP

LAYER SHEAR SUPPORTIVE OF ORGANIZED STORM STRUCTURES WITHIN AN

UNSTABLE AIR MASS /MLCAPE TO 2500 J PER KG/.  ACTIVITY IS EXPECTED

TO CONTINUE DEVELOPING SEWD WITH STRONGER CELLS CAPABLE OF PRODUCING

LARGE HAIL AND DAMAGING WIND GUSTS.



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 550. MEAN STORM

MOTION VECTOR 28025.





...WEISS

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