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

Saturday, December 11, 2010

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

SPC Tornado Watch 764
Sat, 11 Dec 2010 18:00:03 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 764 NWS STORM PREDICTION CENTER NORMAN OK 315 PM CST SAT DEC 11 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF PARTS OF NORTHEAST LOUISIANA LARGE PART OF CENTRAL AND WESTERN MISSISSIPPI EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 315 PM UNTIL 900 PM CST. 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 65 STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTH OF NATCHEZ MISSISSIPPI TO 30 MILES EAST NORTHEAST OF GREENWOOD MISSISSIPPI. 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. DISCUSSION...THUNDERSTORMS ARE INCREASING IN NUMBER AND INTENSITY AHEAD OF STRONG COLD FRONT MOVING EWD ACROSS AR INTO NRN LA. AIR MASS THOUGH ONLY MARGINALLY UNSTABLE...GIVEN THE STRONG SHEAR PROFILES AND APPROACH OF VIGOROUS UPPER JET...WILL BE SUFFICIENTLY UNSTABLE TO SUPPORT LOW TOPPED SUPERCELLS AND A TORNADO THREAT. IN ADDITION DAMAGING WINDS WILL BECOME AN INCREASING THREAT AS STORMS EVOLVE INTO A LINE BY THIS EVENING ALONG THE COLD FRONT AS IT MOVES SEWD ACROSS THE WATCH. 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 400. MEAN STORM MOTION VECTOR 24035. ...HALES

SPC Tornado Watch 764 Status Reports
Sat, 11 Dec 2010 18:00:05 -0600

  STATUS REPORT ON WW 764  SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE ESF TO 45 NW JAN TO 25 NE GWO.  ..BROYLES..12/11/10  ATTN...WFO...JAN...LIX...   STATUS REPORT FOR WT 764   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   LAC025-029-107-120040-  LA  .    LOUISIANA PARISHES INCLUDED ARE  CATAHOULA            CONCORDIA           TENSAS                 MSC001-005-007-015-019-021-029-031-037-049-051-063-065-077-079- 085-089-091-097-099-101-113-121-123-127-129-147-149-155-157-159- 163-120040-  MS  .    MISSISSIPPI COUNTIES INCLUDED ARE  ADAMS                AMITE               ATTALA               CARROLL              CHOCTAW             CLAIBORNE            COPIAH               COVINGTON           FRANKLIN             HINDS                HOLMES              JEFFERSON            JEFFERSON DAVIS      LAWRENCE            LEAKE                LINCOLN              MADISON             MARION               MONTGOMERY           NESHOBA             NEWTON               PIKE                 RANKIN              SCOTT                SIMPSON              SMITH               WALTHALL             WARREN               WEBSTER             WILKINSON

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