Wide Spread Severe Weather Today - Upper Plains & Midwest
Posted by JAC on 6/20/2010, 7:52 am


PUBLIC SEVERE WEATHER OUTLOOK  
  NWS STORM PREDICTION CENTER NORMAN OK
  0317 AM CDT SUN JUN 20 2010
 
  ...SEVERE THUNDERSTORMS EXPECTED OVER PARTS OF THE CENTRAL AND
  NORTHERN PLAINS...AND OVER THE LOWER MISSOURI AND MID MISSISSIPPI
  VALLEYS...THIS AFTERNOON THROUGH EARLY MONDAY...
 
  THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE
  DEVELOPMENT OF TORNADOES...LARGE HAIL...AND DAMAGING WINDS OVER A
  SIZABLE PORTION OF THE NORTH CENTRAL STATES LATER TODAY THROUGH
  EARLY MONDAY.
 
  THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE
 
         IOWA
         FAR SOUTHWEST MINNESOTA
         FAR NORTHERN MISSOURI
         MUCH OF NEBRASKA
         MUCH OF SOUTH DAKOTA
 
  SURROUNDING THE AREA OF GREATEST RISK...SEVERE STORMS ARE ALSO
  POSSIBLE FROM THE NORTHERN ROCKIES THROUGH THE NORTHERN HALF OF THE
  PLAINS INTO THE LOWER OHIO VALLEY.
 
  THE WEATHER PATTERN THAT HAS FOSTERED THE DEVELOPMENT OF NUMEROUS
  CLUSTERS OF SEVERE THUNDERSTORMS OVER THE CENTRAL UNITED STATES IN
  RECENT DAYS WILL PERSIST ACROSS THE REGION THROUGH MONDAY.
 
  THIS PATTERN FEATURES A BAND OF SEASONABLY STRONG JET STREAM WINDS
  EXTENDING FROM THE CENTRAL ROCKIES ACROSS THE CENTRAL PLAINS INTO
  THE MID MISSISSIPPI AND LOWER OHIO VALLEYS.  A DISTURBANCE IN THE
  JET STREAM FLOW...NOW OVER UTAH...WILL REACH NEBRASKA AND SOUTH
  DAKOTA THIS EVENING...BEFORE TURNING EAST INTO THE UPPER MISSISSIPPI
  VALLEY EARLY MONDAY.
 
  ASCENT WITH THE UPPER DISTURBANCE...AND THE CONTINUING PRESENCE OF
  VERY WARM AND HUMID AIR ALONG THE SOUTHERN FRINGE OF THE JET
  STREAM...LIKELY WILL SUPPORT THE DEVELOPMENT OF SEVERAL WAVES OF
  STRONG TO SEVERE STORMS FROM THE CENTRAL AND NORTHERN HIGH PLAINS
  EAST-SOUTHEAST INTO THE MID MISSISSIPPI VALLEY.
 
  STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE ANYWHERE ACROSS THIS
  REGION BETWEEN NOW AND MONDAY MORNING.  HOWEVER...THE MOST INTENSE
  STORMS...WITH THE POTENTIAL FOR TORNADOES...VERY LARGE HAIL...AND
  DAMAGING WIND...SHOULD FORM OVER NEBRASKA AND SOUTH DAKOTA THIS
  AFTERNOON.  THE STORMS LIKELY WILL MERGE INTO ONE OR MORE
  LARGE...LONG-LASTING CLUSTERS THAT SUBSEQUENTLY MOVE EAST-SOUTHEAST
  INTO IOWA...NORTHERN MISSOURI...AND ILLINOIS.  THESE CLUSTERS WILL
  POSE A CONTINUED RISK FOR DAMAGING WIND...HAIL...AND ISOLATED
  TORNADOES TONIGHT THROUGH EARLY MONDAY.
 
  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.
 
  ..CORFIDI.. 06/20/2010
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Wide Spread Severe Weather Today - Upper Plains & Midwest - JAC, 6/20/2010, 7:52 am
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