

447 

WWUS20 KWNS 181814

SEL0

SPC WW 181814

LAZ000-TXZ000-CWZ000-190100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 270

NWS STORM PREDICTION CENTER NORMAN OK

115 PM CDT SAT JUN 18 2016



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN AND SOUTHERN LOUISIANA

  EAST TEXAS

  COASTAL WATERS



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 115 PM UNTIL

  800 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE



SUMMARY...INCREASINGLY ORGANIZED AND INTENSE LINEAR CLUSTERS WILL

MOVE GENERALLY SOUTHWESTWARD ACROSS WESTERN/SOUTHERN LOUISIANA INTO

EAST TEXAS THROUGH THE AFTERNOON. THE DOWNSTREAM AIR MASS IS VERY

UNSTABLE WITH AID OF RICH LOW-LEVEL MOISTURE AND SEASONALLY COOL

MID-LEVEL TEMPERATURES. LOCALIZED WIND DAMAGE IS THE MAIN RISK.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH

NORTHEAST OF LONGVIEW TEXAS TO 35 MILES SOUTH SOUTHEAST OF LAKE

CHARLES LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 04015.





...GUYER

