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Severe Thunderstorm Watch 9
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WW0009 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Low Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL9

   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 9
   NWS STORM PREDICTION CENTER NORMAN OK
   1250 PM CST THU FEB 20 2014

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
     PARTS OF EASTERN ARKANSAS
     CENTRAL AND NORTHERN LOUISIANA
     PARTS OF WESTERN MISSISSIPPI
     PARTS OF EAST CENTRAL AND SOUTHEAST TEXAS

   * EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1250 PM
     UNTIL 800 PM CST.

   * PRIMARY THREATS INCLUDE...
     SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
     A FEW LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE
     A FEW TORNADOES POSSIBLE

   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 105
   STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES EAST
   SOUTHEAST OF LUFKIN TEXAS TO 60 MILES NORTH NORTHEAST OF
   GREENVILLE MISSISSIPPI.  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.

   &&

   DISCUSSION...PRE-FRONTAL STORMS WILL CONTINUE TO INTENSIFY IN A
   NE-SW BAND FROM E TX INTO SE AR THROUGH THE AFTERNOON.  INSTABILITY
   AND DEEP-LAYER VERTICAL SHEAR WILL BE SUFFICIENT FOR A RISK OF
   DAMAGING WINDS AND ISOLATED LARGE HAIL WITH THE STRONGEST EMBEDDED
   LINE SEGMENTS/CELLS...SOME OF WHICH COULD HAVE SUPERCELL STRUCTURE. 
   WHILE A TORNADO OR TWO CANNOT BE RULED OUT...THE TENDENCY FOR MORE
   LINEAR CONVECTION AND WEAKENING LOW-LEVEL SHEAR WITH A NOTED
   VEER-BACK SIGNATURE AROUND 700 MB ALL SUGGEST THAT TORNADOES SHOULD
   NOT BE THE PRIMARY THREAT.

   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 500. MEAN STORM
   MOTION VECTOR 24040.


   ...THOMPSON
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Page last modified: February 21, 2014
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