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

Tuesday, March 8, 2011

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

SPC Tornado Watch 42
Tue, 08 Mar 2011 13:10:03 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 42 NWS STORM PREDICTION CENTER NORMAN OK 110 PM CST TUE MAR 8 2011 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF LARGE PART OF CENTRAL AND SOUTHERN LOUISIANA LARGE PART OF SOUTHERN MISSISSIPPI COASTAL WATERS EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 110 PM UNTIL 800 PM CST. TORNADOES...HAIL TO 2 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 NORTH AND SOUTH OF A LINE FROM 30 MILES WEST SOUTHWEST OF FORT POLK LOUISIANA TO 10 MILES EAST OF PINE BELT MISSISSIPPI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2). 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...VERY MOIST/UNSTABLE AIR MASS SPREADING INLAND LWR MS VALLEY WHERE SHEAR PROFILES ALREADY FAVORABLE FOR SUPERCELLS. EXPECT THUNDERSTORMS TO DEVELOP AND INTENSIFY THRU THE AFTERNOON AS UPPER TROUGH AND STRONG JET APPROACH THE REGION. SUPERCELLS INCLUDING TORNADOES ARE LIKELY WITH THE POTENTIAL FOR A STRONG TORNADO BY LATER THIS AFTERNOON AND EVENING. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 22035. ...HALES

SPC Tornado Watch 42 Status Reports
Tue, 08 Mar 2011 13:10:12 -0600

  STATUS FOR WATCH 0042 HAS NOT BEEN ISSUED YET

SPC Public Severe Weather Outlook
Tue, 08 Mar 2011 11:11:02 -0600

PUBLIC SEVERE WEATHER OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 1109 AM CST TUE MAR 08 2011 ...SEVERE THUNDERSTORMS EXPECTED OVER PARTS OF THE LOWER MISSISSIPPI VALLEY LATER TODAY AND TONIGHT... THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE DEVELOPMENT OF A FEW STRONG TORNADOES OVER PARTS OF THE LOWER MISSISSIPPI VALLEY LATER TODAY AND TONIGHT. THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE MOST OF LOUISIANA SOUTHERN MISSISSIPPI ELSEWHERE...SEVERE STORMS ARE ALSO POSSIBLE FROM EASTERN OKLAHOMA AND TEXAS INTO SOUTHERN MISSOURI...ARKANSAS...NORTHERN MISSISSIPPI AND WESTERN ALABAMA. AN UPPER-LEVEL STORM SYSTEM CENTERED OVER THE CENTRAL AND SOUTHERN HIGH PLAINS WILL MOVE EASTWARD INTO THE MIDDLE MISSISSIPPI VALLEY THROUGH TONIGHT. STRONG SOUTH WINDS JUST ABOVE THE SURFACE WILL RESULT IN A WARM AND MOIST AIR MASS OVER THE WESTERN GULF OF MEXICO TO STREAM NORTHWARD ACROSS THE LOWER MISSISSIPPI VALLEY AS A WARM FRONT SHIFTS TO THE NORTHEAST. LIFT ASSOCIATED WITH THE WARM FRONT AND THE UPPER-LEVEL SYSTEM WILL RESULT IN SCATTERED THUNDERSTORMS THIS AFTERNOON BECOMING MORE NUMEROUS THIS EVENING INTO THE OVERNIGHT. THE GREATEST RISK FOR STRONG TORNADOES WILL BE LATE THIS AFTERNOON THROUGH TONIGHT ACROSS MOST OF LOUISIANA INTO SOUTHERN 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 LATER TODAY.

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