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LAZ000-TXZ000-061900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 63

NWS STORM PREDICTION CENTER NORMAN OK

630 AM CDT SUN APR 6 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN AND NORTHERN LOUISIANA

  CENTRAL AND EASTERN TEXAS



* EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 630 AM UNTIL

  200 PM CDT.



* PRIMARY THREATS INCLUDE...

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

    INCHES IN DIAMETER POSSIBLE

  A FEW DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 160

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

TYLER TEXAS TO 70 MILES SOUTH SOUTHEAST OF LUFKIN TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



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.



&&



DISCUSSION...ELEVATED TSTMS/POSSIBLE SUPERCELLS EXPECTED TO CONTINUE

FORMING IN ZONE OF MAXIMUM WAA/MOISTURE TRANSPORT ALONG 850 MB WARM

FRONT DOWNSTREAM FROM SLOWLY-PROGRESSIVE NM UPR TROUGH. PRESENCE OF

AMPLE CLOUD-LAYER SHEAR /AOA 50 KTS/ AND MOISTURE /PW AROUND 1.25

INCHES/ SUGGESTS THE POTENTIAL FOR LARGE HAIL AND POSSIBLY AN

INSTANCE OR TWO OF LOCALLY DMGG WIND AS LARGE-SCALE ASCENT FURTHER

INCREASES THROUGH LATER THIS MORNING.



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 24035.





...CORFIDI

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