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Severe Thunderstorm Watch 487
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WW0487 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL7

   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 487
   NWS STORM PREDICTION CENTER NORMAN OK
   555 PM CDT MON SEP 1 2014

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
     SOUTHWESTERN ILLINOIS
     EXTREME EASTERN KANSAS
     MISSOURI

   * EFFECTIVE THIS MONDAY AFTERNOON AND TUESDAY MORNING FROM 555 PM
     UNTIL 200 AM CDT.

   * PRIMARY THREATS INCLUDE...
     SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5
       INCHES IN DIAMETER POSSIBLE
     ISOLATED SIGNIFICANT DAMAGING WIND GUSTS TO 75 MPH POSSIBLE

   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTHWEST
   OF JOPLIN MISSOURI TO 15 MILES SOUTH SOUTHEAST OF SAINT LOUIS
   MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).

   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 486...

   DISCUSSION...TSTM COVERAGE AND SVR POTENTIAL ARE FCST TO CONTINUE
   GRADUAL INCREASE ACROSS REGION DURING NEXT SEVERAL HOURS AMIDST
   FAVORABLE MOISTURE...STRENGTHENING LARGE-SCALE ASCENT..AT LEAST
   MRGLLY SUITABLE SHEAR...AND SUPPORTIVE LOW-LEVEL LIFT.  LARGE HAIL
   SHOULD BE PRIMARY HAZARD...THOUGH SOME CONVECTION MAY BECOME
   SFC-BASED WITH DAMAGING GUSTS ALSO POSSIBLE.  REF SPC MESOSCALE
   DISCUSSION 1659 FOR MORE THOROUGH DETAILS ON INITIAL METEOROLOGICAL
   REASONING.

   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 25030.


   ...EDWARDS
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Page last modified: September 02, 2014
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