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Particularly Dangerous Situation (PDS) Tornado Watch 108
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WW0108 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood High High
Severe Wind 65 kt+ Wind
High Low
Severe Hail 2"+ Hail
High High

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL8

   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 108
   NWS STORM PREDICTION CENTER NORMAN OK
   1240 PM CDT MON APR 28 2014

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * TORNADO WATCH FOR PORTIONS OF 
     NORTH AND NORTHWEST ALABAMA
     NORTHEAST LOUISIANA
     CENTRAL AND NORTHEAST MISSISSIPPI
     SOUTHERN MIDDLE TENNESSEE

   * EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 1240 PM UNTIL
     900 PM CDT.

   ...THIS IS A PARTICULARLY DANGEROUS SITUATION...

   * PRIMARY THREATS INCLUDE...
     NUMEROUS TORNADOES EXPECTED WITH A FEW INTENSE TORNADOES LIKELY
     WIDESPREAD LARGE HAIL EXPECTED WITH ISOLATED VERY LARGE HAIL
       EVENTS TO 3 INCHES IN DIAMETER LIKELY
     SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY

   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
   MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH OF HUNTSVILLE
   ALABAMA TO 10 MILES SOUTH OF NATCHEZ MISSISSIPPI.  FOR A COMPLETE
   DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
   (WOUS64 KWNS WOU8).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND 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.

   &&

   DISCUSSION...SURFACE-BASED STORMS ARE BEGINNING TO DEVELOP FROM NE
   LA INTO W CENTRAL MS...WITH ADDITIONAL DEVELOPMENT EXPECTED NEWD
   TOWARD NE MS/NW AL AS CLOUDS CLEAR AND THE LOW LEVELS DESTABILIZE. 
   A COMBINATION OF MODERATE INSTABILITY /MLCAPE NEAR 2000 J PER KG/
   AND STRONG DEEP-LAYER VERTICAL SHEAR WILL SUPPORT A BROKEN BAND OF
   SUPERCELLS...WHILE SOME INCREASE IN LOW-LEVEL SHEAR IS EXPECTED THIS
   AFTERNOON FROM CENTRAL MS INTO NE MS/NW AL...UP TO A RESIDUAL
   OUTFLOW BOUNDARY IN SRN MIDDLE TN.  SOME OF THE SUPERCELLS WILL BE
   LONG-LIVED AND CAPABLE OF PRODUCING STRONG/LONG-TRACK TORNADOES...AS
   WELL AS VERY LARGE HAIL.

   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 24035.


   ...THOMPSON
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Page last modified: April 29, 2014
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