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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 60

NWS STORM PREDICTION CENTER NORMAN OK

335 AM CDT FRI APR 4 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN AND CENTRAL LOUISIANA

  SOUTHEAST TEXAS

  COASTAL WATERS



* EFFECTIVE THIS FRIDAY MORNING FROM 335 AM UNTIL 1100 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH OF

NATCHITOCHES LOUISIANA TO 15 MILES EAST OF HOUSTON TEXAS.  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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 56...WW 57...WW 58...WW

59...



DISCUSSION...TSTMS EXPECTED TO INCREASE ALONG AND AHEAD OF COLD

FRONT MOVING SE ACROSS E TX AND NRN LA. OTHER STORMS MAY FORM ALONG

PRE-FRONTAL CONFLUENCE ZONE OVER FAR E TX/WRN LA. UNDERCUTTING

NATURE OF COLD FRONT /GIVEN STRONG PRESSURE RISES BEHIND THE

BOUNDARY/ SUGGESTS DEVELOPMENT OF A MORE OR LESS SOLID LINE OF

STORMS. WHILE LARGE-SCALE FORCING FOR ASCENT WILL BE MINIMAL ON SRN

FRINGE OF DEPARTING UPR TROUGH...COMBINATION OF AMPLE LOW-LVL

UPLIFT/MOISTURE AND STEEP MID-LVL LAPSE RATES WITH 40 KT WLY DEEP

SHEAR SUGGESTS A POTENTIAL FOR FEW SUSTAINED STORMS/POSSIBLE

SUPERCELLS WITH LARGE HAIL/DMGG WIND.

A NON-ZERO POTENTIAL ALSO WILL EXIST FOR A TORNADO OR

TWO...PARTICULARLY IN CNTRL LA...WHERE UPDRAFTS MAY REMAIN MORE

DISCRETE FOR A GREATER LENGTH OF TIME ALONG PRE-FRONTAL CONFLUENCE

ZONE. IF IT APPEARS THAT A MORE DISCRETE STORM MODE THAN IS NOW

EXPECTED WILL EXIST /BEFORE THE AREA WINDS BEGIN TO DIMINISH AROUND

12Z/...PARTS OF LA MAY REQUIRE UPGRADE TO A TORNADO WATCH.



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 550. MEAN STORM

MOTION VECTOR 29025.





...CORFIDI

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