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Severe Thunderstorm Watch 621
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WW0621 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate 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.
   SEL1
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 621
   NWS STORM PREDICTION CENTER NORMAN OK
   225 PM CDT WED SEP 5 2012
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTHEAST ARKANSAS
          SOUTHERN ILLINOIS
          WESTERN KENTUCKY
          SOUTHEAST AND SOUTH CENTRAL MISSOURI
          NORTHWEST TENNESSEE
   
   EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 225 PM UNTIL
   1000 PM CDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 105
   STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHEAST OF
   CAPE GIRARDEAU MISSOURI TO 20 MILES SOUTHEAST OF WALNUT RIDGE
   ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).
   
   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 619...WW 620...
   
   DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE/STRENGTH OVER
   THE NEXT SEVERAL HOURS ZONE OF MODEST DEEP WNWLY SHEAR BUT STRONG
   SFC-BASED INSTABILITY ALONG THE SRN EDGE OF THE WLYS. LOW-LVL UPLIFT
   MAY BE ENHANCED ALONG WNW-ESE OUTFLOW BOUNDARY IN NRN PART OF WW
   /LEFT BY IL-IND MCS/. DEEP EML AND RICH LOW-LVL MOISTURE SHOULD
   FOSTER DEVELOPMENT OF HAIL/LOCALLY DMGG WIND IN STRONGER
   STORMS...WITH THE ACTIVITY POSSIBLY MERGING INTO A SE-MOVING CLUSTER
   BY EVE.
   
   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 550. MEAN STORM
   MOTION VECTOR 29025.
   
   
   ...CORFIDI
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Page last modified: September 06, 2012
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