Friday, March 4, 2011

NOAA's National Weather Service SPC Tornado/Severe Thunderstorm Watches Update

SPC Severe Thunderstorm Watch 38
Fri, 04 Mar 2011 18:55:02 -0600


WW 0038 Thumbnail Image

  URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 38 NWS STORM PREDICTION CENTER NORMAN OK 650 PM CST FRI MAR 4 2011  THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF          NORTHERN AND WESTERN ARKANSAS        SOUTHERN ILLINOIS        SOUTHERN AND EASTERN MISSOURI  EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 650 PM UNTIL 200 AM CST.  HAIL TO 1.5 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 70 STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES EAST NORTHEAST OF ALTON ILLINOIS TO 25 MILES EAST SOUTHEAST OF FORT SMITH ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).  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...THIS SEVERE THUNDERSTORM WATCH REPLACES SEVERE THUNDERSTORM WATCH NUMBER 36...TORNADO WATCH NUMBER 37. WATCH NUMBER 36 37 WILL NOT BE IN EFFECT AFTER 650 PM CST.   DISCUSSION...SCTD TSTMS EXPECTED TO PERSIST ALONG AND...WITH TIME...BEHIND SW-NE COLD FRONT NOW MOVING SE INTO WRN EDGE OF WW AS SRN PLNS UPR IMPULSE CONTINUES ENEWD.  COMBINATION OF RELATIVELY STEEP MID LVL LAPSE RATES WITH 40 KT SWLY CLOUD-LAYER SHEAR SUGGESTS POTENTIAL FOR A FEW SUSTAINED STORMS WITH HAIL AND POSSIBLY LOCALLY DMGG WIND THROUGH LATE EVE...MAINLY FROM THE AR/OK BORDER AREA ENE INTO SRN MO.  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 450. MEAN STORM MOTION VECTOR 24035.   ...CORFIDI  
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SPC Severe Thunderstorm Watch 38 Status Reports
Fri, 04 Mar 2011 18:55:10 -0600


WW 0038 Thumbnail Image

  STATUS FOR WATCH 0038 HAS NOT BEEN ISSUED YET 
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