ZCZC SPCPWOSPC ALL
   WOUS40 KWNS 200817
   IAZ000-MNZ000-MOZ000-NEZ000-SDZ000-201800-
   
   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
   
   $$