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

SPC Tornado Watch 647
Tue, 07 Sep 2010 19:00:02 -0500

  URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 647 NWS STORM PREDICTION CENTER NORMAN OK 1215 PM CDT TUE SEP 7 2010  THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF          THE I-45 CORRIDOR IN TEXAS        COASTAL WATERS  EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1215 PM UNTIL 800 PM CDT.  TORNADOES...HAIL TO 0.5 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 60 STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF CORSICANA TEXAS TO 35 MILES SOUTHEAST OF ANGLETON TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).  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...THIS TORNADO WATCH REPLACES TORNADO WATCH NUMBER 646. WATCH NUMBER 646 WILL NOT BE IN EFFECT AFTER 1215 PM CDT.   DISCUSSION...RAIN BANDS WILL CONTINUE TO EXPAND EWD/NEWD IN THE OUTER NERN/ERN PARTS OF TROPICAL STORM HERMINE...WHICH CONTINUES TO MOVE NNWWD NEAR SAT.  THE BELT OF ENHANCED LOW-LEVEL SHEAR AND MORE FAVORABLE INSTABILITY SHOULD REMAIN CLOSER TO THE I-45 CORRIDOR FROM HOU TO JUST S OF DAL THROUGH THE AFTERNOON...WITH A FEW EMBEDDED SUPERCELLS.  A TORNADO OR TWO WILL CONTINUE TO BE POSSIBLE.  AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 17035.   ...THOMPSON  

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SPC Tornado Watch 647 Status Reports
Tue, 07 Sep 2010 19:00:05 -0500

  STATUS REPORT ON WW 647  SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 WNW LFK TO 35 W CLL.  ..STOPPKOTTE..09/07/10  ATTN...WFO...FWD...HGX...   STATUS REPORT FOR WT 647   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   TXC001-035-085-113-119-121-139-145-161-213-217-221-223-231-251- 257-289-293-309-349-367-379-395-397-425-439-467-497-080040-  TX  .    TEXAS COUNTIES INCLUDED ARE  ANDERSON             BOSQUE              COLLIN               DALLAS               DELTA               DENTON               ELLIS                FALLS               FREESTONE            HENDERSON            HILL                HOOD                 HOPKINS              HUNT                JOHNSON              KAUFMAN              LEON                LIMESTONE            MCLENNAN             NAVARRO             PARKER               RAINS                ROBERTSON           ROCKWALL             SOMERVELL            TARRANT             VAN ZANDT            WISE                    THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.  

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