April 27: Public Severe Weather Outlook (SPC)

...OUTBREAK OF SEVERE THUNDERSTORMS AND TORNADOES EXPECTED OVER
   PARTS OF THE TENNESSEE VALLEY AND SOUTHEAST US THIS AFTERNOON AND
   TONIGHT...
   
   THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE
   DEVELOPMENT OF A FEW STRONG TO VIOLENT...LONG-TRACK TORNADOES OVER
   PARTS OF THE TENNESSEE VALLEY AND SOUTHEAST US THIS AFTERNOON AND
   TONIGHT.
   
   THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE
   
          NORTHERN ALABAMA
          FAR NORTHWESTERN GEORGIA
          NORTHEASTERN MISSISSIPPI
          SOUTHERN TENNESSEE
   
   ELSEWHERE...SEVERE STORMS ARE ALSO POSSIBLE FROM...THE LOWER GREAT
   LAKES REGION AND MIDDLE ATLANTIC TO THE CENTRAL AND EASTERN GULF
   COAST STATES.
   
   THUNDERSTORMS ARE EXPECTED TO ERUPT OVER PARTS OF THE LOWER
   MISSISSIPPI VALLEY BY EARLY AFTERNOON AHEAD OF A POWERFUL STORM
   SYSTEM CURRENTLY OVER THE CENTRAL AND SOUTHERN PLAINS. THE STORMS
   WILL QUICKLY MOVE EAST-NORTHEASTWARD OVER THE TENNESSEE VALLEY AND
   SOUTHEAST STATES THIS AFTERNOON AND EVENING...WITH ADDITIONAL STORMS
   DEVELOPING INTO THE LOWER GREAT LAKES AND OHIO VALLEY REGION. STORMS
   WILL SHIFT EASTWARD ACROSS PORTIONS OF THE NORTHEASTERN...MIDDLE
   ATLANTIC...AND SOUTHEASTERN STATES DURING THE EVENING AND OVERNIGHT
   HOURS. AS THE THUNDERSTORMS ENCOUNTER A VERY MOIST AND UNSTABLE AIR
   MASS...THEY WILL RAPIDLY BECOME SEVERE WITH THE POTENTIAL TO PRODUCE
   STRONG TO VIOLENT...LONG-TRACK TORNADOES...LARGE HAIL...AND
   WIDESPREAD DAMAGING WINDS.
   
   THE MOST INTENSE STORMS ARE EXPECTED ACROSS NORTHERN ALABAMA...FAR
   NORTHWESTERN GEORGIA...NORTHEASTERN MISSISSIPPI...AND SOUTHERN
   TENNESSEE. A HIGH RISK FOR SEVERE THUNDERSTORMS IS IN EFFECT FOR
   THESE AREAS. FUTURE FORECASTS MAY EXPAND THIS AREA TO INCLUDE
   PORTIONS OF EASTERN TENNESSEE...AS WELL AS AREAS FARTHER SOUTH INTO
   EASTERN MISSISSIPPI AND WESTERN ALABAMA.
   
   STATE AND LOCAL EMERGENCY MANAGERS ARE MONITORING THIS POTENTIALLY
   VERY DANGEROUS 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.