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Mesoscale Discussion 145
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   MESOSCALE DISCUSSION 0145
   NWS STORM PREDICTION CENTER NORMAN OK
   0754 PM CDT WED MAR 25 2015

   AREAS AFFECTED...PORTIONS OF SOUTHWEST THROUGH NORTHEAST OK...FAR
   SOUTHWEST AND SOUTH-CENTRAL MO...NORTHWEST AND NORTH-CENTRAL AR

   CONCERNING...SEVERE THUNDERSTORM WATCH 6...

   VALID 260054Z - 260200Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 6 CONTINUES.

   SUMMARY...A LINE OF THUNDERSTORMS FROM CENTRAL THROUGH NORTHEAST
   OKLAHOMA INTO NORTHERN ARKANSAS WILL CONTINUE TO TRACK SOUTHEAST
   DURING THE EVENING. A THREAT FOR SEVERE HAIL WILL CONTINUE THE NEXT
   FEW HOURS...BUT THE TORNADO THREAT APPEARS TO HAVE DIMINISHED.

   DISCUSSION...RADAR TRENDS OVER THE LAST HOUR OR SO CONTINUE TO SHOW
   THUNDERSTORMS CONGEALING INTO A SOUTHEASTWARD-MOVING LINE. MOST OF
   THE LINE APPEARS TO BE WELL BEHIND THE SURGING SURFACE COLD FRONT.
   IN CONCERT WITH INCREASING SBCINH...THESE STORMS WILL BECOME MORE
   ELEVATED AND GENERALLY WEAKEN WITH TIME AS DIURNAL COOLING CONTINUES
   AND UPPER FORCING FOR ASCENT SHIFTS NORTHEASTWARD.
   HOWEVER...MIDLEVEL LAPSE RATES CONTINUE TO BE STEEP...FROM 7.5 TO
   8.5 DEGREES C PER KM AS INDICATED IN 00Z OUN...LZK AND FWD RAOBS.
   THIS WILL ALLOW FOR SOME HAIL THREAT TO CONTINUE FOR ANOTHER 2-3
   HOURS. FURTHERMORE...THE TORNADO THREAT HAS GREATLY DIMINISHED AS
   THE SURFACE BOUNDARY HAS SURGED AHEAD OF THE STORMS.

   ..LEITMAN.. 03/26/2015


   ATTN...WFO...LZK...SGF...TSA...OUN...

   LAT...LON   36159801 37109143 35249143 34519797 36159801 

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Page last modified: March 26, 2015
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