ZCZC SPCPWOSPC ALL WOUS40 KWNS 271726 ALZ000-GAZ000-MSZ000-TNZ000-280200-
PUBLIC SEVERE WEATHER OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 1226 PM CDT WED APR 27 2011
...OUTBREAK OF TORNADOES AND SEVERE THUNDERSTORMS EXPECTED OVER PARTS OF THE TENNESSEE VALLEY...SOUTHERN APPALACHIAN MOUNTAINS AND SOUTHERN OHIO VALLEY THIS AFTERNOON THROUGH TONIGHT...
THE NATIONAL WEATHER SERVICE STORM PREDICTION CENTER IN NORMAN OKLAHOMA IS FORECASTING THE DEVELOPMENT OF NUMEROUS TORNADIC STORMS WITH A FEW STRONG TO VIOLENT...LONG-TRACK TORNADOES OVER PARTS OF THE TENNESSEE VALLEY AND SOUTHERN APPALACHIAN MOUNTAINS. THE THREAT FOR TORNADIC STORMS SHOULD ALSO EXTEND NORTHWARD INTO THE SOUTHERN OHIO VALLEY THIS AFTERNOON THROUGH TONIGHT.
THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE
NORTHERN AND CENTRAL ALABAMA FAR NORTHWESTERN GEORGIA EASTERN MISSISSIPPI SOUTHERN TENNESSEE
ELSEWHERE...SEVERE THUNDERSTORMS ARE ALSO POSSIBLE FROM THE CENTRAL AND EASTERN GULF COAST STATES NORTHEASTWARD ACROSS THE OHIO VALLEY...CAROLINAS...CENTRAL TO NORTHERN APPALACHIAN MOUNTAINS AND MIDDLE-ATLANTIC.
STRONG THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER PARTS OF THE LOWER MISSISSIPPI VALLEY AND TENNESSEE VALLEY THIS AFTERNOON AHEAD OF A POWERFUL STORM SYSTEM CURRENTLY ENTERING THE REGION FROM THE WEST. THE STORMS WILL QUICKLY MOVE EAST TO NORTHEASTWARD OVER THE TENNESSEE AND OHIO VALLEYS INTO THE SOUTHERN APPALACHIAN MOUNTAINS THIS AFTERNOON AND EVENING. AS THE THUNDERSTORMS ENCOUNTER A VERY MOIST UNSTABLE AIR MASS AND INTERACT WITH STRONG WIND SHEAR...THE RAPID DEVELOPMENT OF SEVERE STORMS WILL OCCUR. A POTENTIAL FOR STRONG TO VIOLENT...LONG-TRACK TORNADOES WILL EXIST IN THE TENNESSEE VALLEY AND SOUTHERN APPALACHIAN MOUNTAINS. NUMEROUS TORNADIC STORMS WITH LARGE HAIL...AND WIDESPREAD DAMAGING WINDS WILL ALSO BE POSSIBLE ACROSS THE REMAINDER OF THE OHIO VALLEY AND CENTRAL GULF COAST STATES. ADDITIONAL STRONG TO SEVERE THUNDERSTORMS ARE FORECAST TO DEVELOP FROM THE OHIO VALLEY AND CAROLINAS NORTHEASTWARD INTO THE CENTRAL TO NORTHERN APPALACHIAN MOUNTAINS BY THE OVERNIGHT PERIOD.
THE MOST INTENSE STORMS ARE EXPECTED ACROSS NORTHERN ALABAMA...FAR NORTHWESTERN GEORGIA...NORTHEASTERN MISSISSIPPI...AND SOUTHERN TENNESSEE. A HIGH RISK FOR DAMAGING TORNADIC 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.