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

Monday, November 29, 2010

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

SPC Tornado Watch 754
Mon, 29 Nov 2010 18:00:03 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 754 NWS STORM PREDICTION CENTER NORMAN OK 445 PM CST MON NOV 29 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHEAST LOUISIANA SOUTHWEST INTO EAST CENTRAL MISSISSIPPI EFFECTIVE THIS MONDAY AFTERNOON FROM 445 PM UNTIL MIDNIGHT CST. 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 55 MILES NORTH NORTHWEST OF MERIDIAN MISSISSIPPI TO 30 MILES SOUTH OF BATON ROUGE LOUISIANA. 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 753... DISCUSSION...SCATTERED WARM SECTOR CONVECTION WILL PERSIST THROUGH THE EVENING FROM SE LA NNEWD INTO CENTRAL MS. AS THESE STORMS SLOWLY DEEPEN WITH INCREASING LOW-LEVEL MOISTURE...THE POTENTIAL WILL LIKEWISE INCREASE FOR STRENGTHENING STORM ROTATION AND AN ATTENDANT RISK FOR A COUPLE OF TORNADOES. THE MOST PROBABLE TORNADO THREAT AREA WILL BE AS STORM INTERACT WITH THE NWD MOVING WARM FRONT IN MS...WHERE LOW-LEVEL SHEAR IS STRONGEST. 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 23035. ...THOMPSON

SPC Tornado Watch 753
Mon, 29 Nov 2010 18:00:07 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 753 NWS STORM PREDICTION CENTER NORMAN OK 130 PM CST MON NOV 29 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHERN ARKANSAS WESTERN AND CENTRAL LOUISIANA WESTERN MISSISSIPPI EASTERN TEXAS COASTAL WATERS EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 130 PM UNTIL 900 PM CST. TORNADOES...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 75 STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES EAST OF PORT ARTHUR TEXAS TO 10 MILES NORTH OF GREENVILLE 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. DISCUSSION...TSTMS WILL CONTINUE TO INCREASE IN COVERAGE AND INTENSITY THIS AFTERNOON INTO EVENING ALONG PACIFIC FRONT AND SW-NE ORIENTED CONFLUENCE BAND WHICH ARE SLOWLY PROGRESSING EWD THROUGH ERN TX. 18Z SUPPLEMENTAL SOUNDINGS INDICATE THAT MOISTENING AND WARMING OF THE BOUNDARY LAYER HAVE GREATLY REDUCED THE PRONOUNCED CAP OBSERVED AT 12Z. GIVEN THE RELATIVELY STRONG LOW AND DEEP-LAYER SHEAR IN PLACE...ENVIRONMENT WILL BE SUPPORTIVE OF SUPERCELLS CAPABLE OF TORNADOES...DAMAGING WINDS AND SOME HAIL. THIS THREAT SHOULD DEVELOP NEWD THROUGH THE REMAINDER OF THE AFTERNOON INTO TONIGHT ALONG RETREATING WARM FRONT AND SECONDARY SURFACE LOW DEVELOPING THROUGH ERN AR/WRN MS. 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 23035. ...MEAD

SPC Tornado Watch 754 Status Reports
Mon, 29 Nov 2010 18:00:06 -0600

  STATUS REPORT ON WW 754  THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.  ..KERR..11/29/10  ATTN...WFO...LIX...JAN...   STATUS REPORT FOR WT 754   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   LAC005-033-037-047-063-077-091-103-105-117-121-125-300040-  LA  .    LOUISIANA PARISHES INCLUDED ARE  ASCENSION            EAST BATON ROUGE    EAST FELICIANA       IBERVILLE            LIVINGSTON          POINTE COUPEE        ST. HELENA           ST. TAMMANY         TANGIPAHOA           WASHINGTON           WEST BATON ROUGE    WEST FELICIANA         MSC005-007-023-029-031-035-037-049-061-065-067-069-073-075-077- 079-085-089-091-099-101-103-109-113-121-123-127-129-147-157-159- 300040-  MS  .    MISSISSIPPI COUNTIES INCLUDED ARE  AMITE                ATTALA              CLARKE               COPIAH               COVINGTON           FORREST              FRANKLIN             HINDS               JASPER               JEFFERSON DAVIS      JONES               KEMPER               LAMAR                LAUDERDALE          LAWRENCE             LEAKE                LINCOLN             MADISON              MARION               NESHOBA             NEWTON               NOXUBEE              PEARL RIVER         PIKE

SPC Tornado Watch 753 Status Reports
Mon, 29 Nov 2010 18:00:09 -0600

  STATUS REPORT ON WW 753  SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 ESE SHV TO 10 WSW LLQ.  ..KERR..11/29/10  ATTN...WFO...JAN...LZK...SHV...LCH...   STATUS REPORT FOR WT 753   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   ARC003-017-041-043-300040-  AR  .    ARKANSAS COUNTIES INCLUDED ARE  ASHLEY               CHICOT              DESHA                DREW                    LAC001-003-009-011-019-021-023-025-029-035-039-041-043-049-053- 059-065-067-069-073-079-081-083-085-097-107-115-123-127- 300040-  LA  .    LOUISIANA PARISHES INCLUDED ARE  ACADIA               ALLEN               AVOYELLES            BEAUREGARD           CALCASIEU           CALDWELL             CAMERON              CATAHOULA           CONCORDIA            EAST CARROLL         EVANGELINE          FRANKLIN             GRANT                JACKSON             JEFFERSON DAVIS      LA SALLE             MADISON             MOREHOUSE            NATCHITOCHES         OUACHITA            RAPIDES              RED RIVER            RICHLAND            SABINE               ST. LANDRY           TENSAS              VERNON

SPC Public Severe Weather Outlook
Mon, 29 Nov 2010 13:39:02 -0600

 PUBLIC SEVERE WEATHER OUTLOOK   NWS STORM PREDICTION CENTER NORMAN OK 0138 PM CST MON NOV 29 2010  ...SEVERE THUNDERSTORMS EXPECTED OVER PARTS OF THE LOWER MISSISSIPPI VALLEY THIS EVENING AND OVERNIGHT...  THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE POSSIBLE DEVELOPMENT OF TORNADOES...POTENTIALLY STRONG...AND DAMAGING WIND GUSTS OVER PARTS OF THE LOWER MISSISSIPPI VALLEY THIS EVENING AND OVERNIGHT.  CONDITIONS ARE EXPECTED TO SUPPORT THE POTENTIAL FOR A FEW STRONG AND POSSIBLY LONG-LIVED TORNADOES.  WHILE OVERALL SEVERE THUNDERSTORM COVERAGE IS NOT EXPECTED TO BE WIDESPREAD...THE POTENTIAL FOR A SIGNIFICANT TORNADO AFTER DARK WARRANTS HEIGHTENED SAFETY PRECAUTIONS.  TORNADOES DURING THE OVERNIGHT HOURS AT THIS TIME OF YEAR CAN BE PARTICULARLY DANGEROUS BECAUSE THEY ARE USUALLY FAST-MOVING AND OBSCURED BY RAIN AND DARKNESS.  THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE         SOUTHEAST ARKANSAS        EASTERN LOUISIANA        MOST OF MISSISSIPPI  STATE AND LOCAL EMERGENCY MANAGERS ARE MONITORING THIS DEVELOPING SITUATION. THOSE IN THE THREATENED AREA ARE URGED TO REVIEW SEVERE WEATHER SAFETY RULES AND TO LISTEN TO RADIO...TELEVISION...AND NOAA WEATHER RADIO FOR POSSIBLE WATCHES...WARNINGS...AND STATEMENTS TONIGHT.  ..RACY.. 11/29/2010

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