samedi 14 avril 2012

http://www.spc.noaa.gov/products/outlook/pwo.mp4////////// Warning!!!

PUBLIC SEVERE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0523 AM CDT SAT APR 14 2012
   
   ...AN OUTBREAK OF SEVERE THUNDERSTORMS AND TORNADOES IS EXPECTED
   OVER PARTS OF THE CENTRAL PLAINS THIS AFTERNOON AND TONIGHT...
   
   THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE
   DEVELOPMENT OF A FEW STRONG...LONG-TRACK TORNADOES OVER PARTS OF THE
   CENTRAL PLAINS THIS AFTERNOON AND TONIGHT.
   
   THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE
   
          CENTRAL AND EASTERN KANSAS
          CENTRAL AND EASTERN NEBRASKA
          CENTRAL AND NORTH CENTRAL OKLAHOMA
   
   ELSEWHERE...SEVERE STORMS ARE ALSO POSSIBLE FROM...NORTH TEXAS TO
   IOWA AND SOUTHEAST SOUTH DAKOTA/SOUTHERN MINNESOTA.
   
   A VERY MOIST AND UNSTABLE AIR MASS WILL SPREAD NORTHWARD FROM
   OKLAHOMA TO KANSAS AND NEBRASKA TODAY...IN ADVANCE OF A STRONG
   UPPER-LEVEL STORM SYSTEM AND STRENGTHENING SURFACE LOW PRESSURE
   SYSTEM.  AFTER SOME MORNING-EARLY AFTERNOON STORMS FROM NORTHEAST
   OKLAHOMA TO EASTERN NEBRASKA...MORE INTENSE STORM DEVELOPMENT IS
   EXPECTED NEAR THE SURFACE LOW IN CENTRAL NEBRASKA THIS
   AFTERNOON...AND SOUTHWARD ALONG THE WEST EDGE OF THE MOIST/UNSTABLE
   AIR MASS IN CENTRAL KANSAS AND WESTERN/CENTRAL OKLAHOMA.  THE STORM
   ENVIRONMENT APPEARS TO BE VERY FAVORABLE FOR SUPERCELL THUNDERSTORMS
   CAPABLE OF PRODUCING VERY LARGE HAIL AND DAMAGING TORNADOES FOR LONG
   PATHS FROM LATE AFTERNOON UNTIL AT LEAST MIDNIGHT.  EVEN THOUGH THE
   STORMS COULD REMAIN WIDELY SEPARATED...FAST-MOVING TORNADOES
   CONTINUING AFTER DARK WILL HEIGHTEN THE RISK TO LIFE AND PROPERTY. 
   SOME OF THE LARGER CITIES THAT MAY BE IMPACTED INCLUDE OMAHA AND
   LINCOLN NEBRASKA...TOPEKA AND WICHITA KANSAS...AS WELL AS OKLAHOMA
   CITY AND TULSA OKLAHOMA.
   
   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.

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