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

Tuesday, October 26, 2010

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

SPC Tornado Watch 729
Tue, 26 Oct 2010 19:00:03 -0500

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 729 NWS STORM PREDICTION CENTER NORMAN OK 720 PM EDT TUE OCT 26 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF DISTRICT OF COLUMBIA EXTREME NORTHEAST GEORGIA WESTERN MARYLAND WESTERN NORTH CAROLINA UPSTATE SOUTH CAROLINA WESTERN AND NORTHERN VIRGINIA THE EASTERN WEST VIRGINIA PANHANDLE COASTAL WATERS EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 720 PM UNTIL 300 AM EDT. 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 65 STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHEAST OF MARTINSBURG WEST VIRGINIA TO 10 MILES SOUTH SOUTHWEST OF ANDERSON SOUTH CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9). 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 725...WW 726...WW 727...WW 728... DISCUSSION...SCATTERED SEVERE STORMS WILL CONTINUE IN A LOOSE BAND FROM SC NEWD INTO WRN NC AND WRN VA THIS EVENING...IN AN ENVIRONMENT FAVORING SUPERCELLS WITH THE POTENTIAL FOR A FEW TORNADOES. FARTHER N AND LATER...A BAND OF ASCENT ASSOCIATED WITH THE SQUALL LINE WHICH WEAKENED OVER THE APPALACHIANS WILL ENCOUNTER A MORE MOIST/UNSTABLE ENVIRONMENT ACROSS VA/MD. HERE...STRONG VERTICAL SHEAR COULD SUPPORT THE FORMATION OF ADDITIONAL BOWING SEGMENTS AND EMBEDDED SUPERCELLS...WITH THE POTENTIAL FOR DAMAGING WINDS AND A COUPLE OF TORNADOES TONIGHT. 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 450. MEAN STORM MOTION VECTOR 24035. ...THOMPSON

SPC Tornado Watch 728
Tue, 26 Oct 2010 19:00:06 -0500

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 728 NWS STORM PREDICTION CENTER NORMAN OK 300 PM CDT TUE OCT 26 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF NORTHERN AND CENTRAL ALABAMA EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 300 PM UNTIL 900 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 55 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST OF TUSCALOOSA ALABAMA TO 30 MILES EAST OF ANNISTON ALABAMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8). 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 722...WW 723...WW 725...WW 726...WW 727... DISCUSSION...BANDS OF TSTMS ARE GRADUALLY INTENSIFYING THIS AFTERNOON WITHIN A WARM...MOIST AIR MASS WITH MLCAPE OF 1000-1500 J/KG. LOW-LEVEL WIND FILED IS GRADUALLY VEERING...THOUGH SUFFICIENT LOW AND DEEP-LAYER SHEAR STILL EXISTS FOR SUPERCELLS CAPABLE OF TORNADOES AND 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 25035. ...MEAD

SPC Tornado Watch 727
Tue, 26 Oct 2010 19:00:10 -0500

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 727 NWS STORM PREDICTION CENTER NORMAN OK 220 PM EDT TUE OCT 26 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF NORTHERN GEORGIA FAR WESTERN NORTH CAROLINA EASTERN TENNESSEE FAR WESTERN VIRGINIA EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 220 PM UNTIL 1000 PM EDT. 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 60 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTH SOUTHEAST OF CHATTANOOGA TENNESSEE TO 55 MILES NORTH OF BRISTOL TENNESSEE. 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...CONTINUE...WW 722...WW 723...WW 724...WW 725...WW 726... DISCUSSION...TSTMS ARE EXPECTED TO INCREASE IN COVERAGE AND INTENSITY THIS AFTERNOON ALONG AND IN THE WAKE OF GRAVITY WAVE PROPAGATING SEWD THROUGH THE AREA. AMBIENT AIR MASS CONTINUES TO WARM/DESTABILIZE WITH MLCAPE VALUES NOW AROUND 500-1000 J/KG. GIVEN THE STRONG LOW AND DEEP-LAYER SHEAR IN PLACE...ENVIRONMENT WILL BE SUPPORTIVE OF SUPERCELLS CAPABLE OF DAMAGING WINDS AND A FEW TORNADOES. 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 23040. ...MEAD

SPC Tornado Watch 726
Tue, 26 Oct 2010 19:00:13 -0500

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 726 NWS STORM PREDICTION CENTER NORMAN OK 135 PM EDT TUE OCT 26 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EASTERN KENTUCKY WESTERN MARYLAND PANHANDLE FAR WESTERN NEW YORK EASTERN OHIO WESTERN PENNSYLVANIA FAR WESTERN VIRGINIA WEST VIRGINIA LAKE ERIE EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 135 PM UNTIL 900 PM EDT. TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH OF FRANKLIN PENNSYLVANIA TO 50 MILES WEST OF BLUEFIELD WEST VIRGINIA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6). 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 722...WW 723...WW 724...WW 725... DISCUSSION...LONG-LIVED QLCS WITH A HISTORY OF WIDESPREAD WIND DAMAGE AND A FEW TORNADOES IS EXPECTED TO CONTINUE EWD THROUGH THE UPPER OH VALLEY AND CUMBERLAND PLATEAU THIS AFTERNOON INTO EVENING. BOUNDARY LAYER AHEAD OF CONVECTIVE SYSTEM IS WARMING/MOISTENING... SUPPORTING A NARROW AXIS OF MARGINAL...BUT SUFFICIENT INSTABILITY. GIVEN THE VERY STRONG LOW AND DEEP-LAYER SHEAR IN PLACE... ENVIRONMENT WILL REMAIN FAVORABLE FOR EMBEDDED BOWS AND SUPERCELLS CAPABLE OF DAMAGING WINDS AND A FEW TORNADOES. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 24045. ...MEAD

SPC PDS Tornado Watch 723
Tue, 26 Oct 2010 14:47:05 -0500

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 723 NWS STORM PREDICTION CENTER NORMAN OK 930 AM CDT TUE OCT 26 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF NORTHERN ALABAMA MIDDLE TENNESSEE EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 930 AM UNTIL 500 PM CDT. ...THIS IS A PARTICULARLY DANGEROUS SITUATION... DESTRUCTIVE TORNADOES...LARGE HAIL TO 1.5 INCHES IN DIAMETER... THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTHEAST OF NASHVILLE TENNESSEE TO 55 MILES SOUTHEAST OF TUPELO MISSISSIPPI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3). 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 720...WW 721...WW 722... DISCUSSION...A PRE-FRONTAL BAND OF CONVECTION CURRENTLY DEEPENING FROM N-CNTRL MS NWD TO E OF MKL IS EXPECTED TO EVOLVE INTO TSTMS LATE THIS MORNING WITHIN A STRONGLY SHEARED AND WARMING/DESTABILIZING ENVIRONMENT. THE COMBINATION OF EFFECTIVE SRH OF 300-400 M2/S2...MLCAPE OF 500-1000 J/KG AND THE POTENTIAL FOR MORE DISCRETE STORM MODES SUGGEST A THREAT LONG-TRACKED SUPERCELLS CAPABLE OF STRONG TORNADOES. AVIATION...TORNADOES AND 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 500. MEAN STORM MOTION VECTOR 24050. ...MEAD

SPC Tornado Watch 729 Status Reports
Tue, 26 Oct 2010 19:00:05 -0500

  STATUS FOR WATCH 0729 HAS NOT BEEN ISSUED YET

SPC Tornado Watch 728 Status Reports
Tue, 26 Oct 2010 19:00:09 -0500

  STATUS REPORT ON WW 728  SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 ESE CBM TO 35 SSW HSV.  FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 2011  ..STOPPKOTTE..10/26/10  ATTN...WFO...BMX...   STATUS REPORT FOR WT 728   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   ALC001-007-009-015-017-019-021-027-029-037-047-051-055-057-063- 065-073-091-105-107-111-115-117-119-121-123-125-127-270040-  AL  .    ALABAMA COUNTIES INCLUDED ARE  AUTAUGA              BIBB                BLOUNT               CALHOUN              CHAMBERS            CHEROKEE             CHILTON              CLAY                CLEBURNE             COOSA                DALLAS              ELMORE               ETOWAH               FAYETTE             GREENE               HALE                 JEFFERSON           MARENGO              PERRY                PICKENS             RANDOLPH             ST. CLAIR            SHELBY              SUMTER               TALLADEGA            TALLAPOOSA          TUSCALOOSA           WALKER                  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.

SPC Tornado Watch 727 Status Reports
Tue, 26 Oct 2010 19:00:12 -0500

  STATUS REPORT ON WW 727  SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 E CSV TO 30 NNW HSS TO 45 W BLF.  ..STOPPKOTTE..10/26/10  ATTN...WFO...FFC...GSP...MRX...   STATUS REPORT FOR WT 727   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   GAC011-015-045-047-055-057-067-077-083-085-097-111-115-117-121- 123-129-139-143-149-187-213-223-227-233-281-285-291-295-311-313- 270040-  GA  .    GEORGIA COUNTIES INCLUDED ARE  BANKS                BARTOW              CARROLL              CATOOSA              CHATTOOGA           CHEROKEE             COBB                 COWETA              DADE                 DAWSON               DOUGLAS             FANNIN               FLOYD                FORSYTH             FULTON               GILMER               GORDON              HALL                 HARALSON             HEARD               LUMPKIN              MURRAY               PAULDING            PICKENS              POLK                 TOWNS               TROUP                UNION                WALKER              WHITE                WHITFIELD               NCC039-043-270040-  NC  .    NORTH CAROLINA COUNTIES INCLUDED ARE

SPC Tornado Watch 726 Status Reports
Tue, 26 Oct 2010 19:00:15 -0500

  STATUS REPORT ON WW 726  SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 60 N TRI TO 50 ENE CRW TO 25 ESE MGW TO 30 NE BFD.  ..STOPPKOTTE..10/26/10  ATTN...WFO...JKL...RLX...PBZ...BUF...CLE...CTP...   STATUS REPORT FOR WT 726   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   MDC023-270040-  MD  .    MARYLAND COUNTIES INCLUDED ARE  GARRETT                 PAC021-023-033-111-270040-  PA  .    PENNSYLVANIA COUNTIES INCLUDED ARE  CAMBRIA              CAMERON             CLEARFIELD           SOMERSET                VAC027-051-270040-  VA  .    VIRGINIA COUNTIES INCLUDED ARE  BUCHANAN             DICKENSON

SPC Tornado Watch 725 Status Reports
Tue, 26 Oct 2010 19:00:19 -0500

  STATUS REPORT ON WW 725  SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 NNE HEZ TO 35 E GWO TO 5 WNW MSL.  ..ROGERS..10/26/10  ATTN...WFO...MEG...JAN...   STATUS REPORT FOR WT 725   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   MSC007-015-017-019-021-025-049-051-057-069-079-087-089-095-097- 099-103-105-121-123-149-155-159-163-262140-  MS  .    MISSISSIPPI COUNTIES INCLUDED ARE  ATTALA               CARROLL             CHICKASAW            CHOCTAW              CLAIBORNE           CLAY                 HINDS                HOLMES              ITAWAMBA             KEMPER               LEAKE               LOWNDES              MADISON              MONROE              MONTGOMERY           NESHOBA              NOXUBEE             OKTIBBEHA            RANKIN               SCOTT               WARREN               WEBSTER              WINSTON             YAZOO                  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.

SPC Tornado Watch 723 Status Reports
Tue, 26 Oct 2010 14:47:06 -0500

  STATUS REPORT ON WW 723  SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 WSW TUP TO 40 NE MSL TO 35 SE BWG.  ..DIAL..10/26/10  ATTN...WFO...BMX...HUN...OHX...MRX...   STATUS REPORT FOR WT 723   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   ALC009-033-043-049-057-059-071-073-075-077-079-083-089-093-095- 103-127-133-262040-  AL  .    ALABAMA COUNTIES INCLUDED ARE  BLOUNT               COLBERT             CULLMAN              DEKALB               FAYETTE             FRANKLIN             JACKSON              JEFFERSON           LAMAR                LAUDERDALE           LAWRENCE            LIMESTONE            MADISON              MARION              MARSHALL             MORGAN               WALKER              WINSTON                TNC003-015-027-031-035-041-049-051-055-061-087-103-111-117-127- 133-137-141-149-159-169-175-177-185-189-262040-  TN  .    TENNESSEE COUNTIES INCLUDED ARE  BEDFORD              CANNON              CLAY                 COFFEE               CUMBERLAND          DEKALB               FENTRESS             FRANKLIN            GILES                GRUNDY               JACKSON             LINCOLN              MACON                MARSHALL            MOORE

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