Wednesday, October 27, 2010

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

SPC Tornado Watch 734
Wed, 27 Oct 2010 11:52:08 -0500


WW 0734 Thumbnail Image

  URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 734 NWS STORM PREDICTION CENTER NORMAN OK 1150 AM CDT WED OCT 27 2010  THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF          CENTRAL ALABAMA        NORTHERN AND CENTRAL GEORGIA        EAST-CENTRAL MISSISSIPPI  EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1150 AM UNTIL 700 PM CDT.  TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.  THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE MILES EITHER SIDE OF A LINE FROM 70 MILES SOUTHWEST OF TUSCALOOSA ALABAMA TO 25 MILES EAST OF ATHENS GEORGIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).  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.  OTHER WATCH INFORMATION...CONTINUE...WW 732...WW 733...  DISCUSSION...AN UPSWING IN TSTM ACTIVITY IS ANTICIPATED THIS AFTERNOON ALONG AND S/SE OF SYNOPTIC BOUNDARY WITHIN A WARM...HUMID AIR MASS WHERE MLCAPE WILL APPROACH 1000-1500 J/KG.  REGION WILL REMAIN ALONG SERN PERIPHERY OF STRONGEST CYCLONIC MID AND HIGH-LEVEL FLOW WITH SUFFICIENT /35-45 KT/ DEEP-LAYER SHEAR TO SUPPORT SUPERCELLS.  STEEPENING LOW-LEVEL LAPSE RATES...A CORRIDOR OF LOCALLY HIGHER VORTICITY INVOF FRONT AND MAINTENANCE OF SWRN EXTENSION OF SWLY 30-40 KT LLJ ACROSS AREA INDICATE A RISK FOR A COUPLE OF TORNADOES IN ADDITION TO LOCALLY DAMAGING WIND GUSTS.  AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 26030.   ...MEAD  
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SPC Tornado Watch 734 Status Reports
Wed, 27 Oct 2010 11:52:16 -0500


WW 0734 Thumbnail Image

  STATUS FOR WATCH 0734 HAS NOT BEEN ISSUED YET 
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