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Mesoscale Discussion 868
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   MESOSCALE DISCUSSION 0868
   NWS STORM PREDICTION CENTER NORMAN OK
   0622 PM CDT SAT MAY 10 2008
   
   AREAS AFFECTED...CNTRL/SRN AR...WRN TN...NRN MS
   
   CONCERNING...TORNADO WATCH 296...298...
   
   VALID 102322Z - 110045Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 296...298...CONTINUES.
   
   TORNADIC SUPERCELL TSTMS CONTINUE TO INTENSIFY OVER EXTREME SWRN MO
   SWD INTO ERN OK EARLY THIS EVENING.  TO THE EAST...STRONG-SVR TSTMS
   ALSO EXIST...PRIMARILY ALONG SRN EDGE OF A COLD POOL...OR FOOTPRINT
   OF EARLIER DAY CONVECTION ACROSS CNTRL AR NEWD INTO THE JONESBORO
   AREA. 
   
   HIGHEST TORNADO POTENTIAL THROUGH MID-EVENING...WITHIN TORNADO
   WATCHES 296/298...WILL LIKELY REMAIN NEAR/S OF FORT SMITH AR EWD
   ACROSS CNTRL/SRN AR ALONG THE OUTFLOW BOUNDARY...THEN INTO NWRN/NRN
   MS AND WRN TN...INCLUDING THE MEMPHIS METRO AREA.  
   
   FORT SMITH...MEMPHIS AND LITTLE ROCK VWPS EXHIBITED 0-1KM SRH IN
   EXCESS OF 250 M2/S2...AND GIVEN LOW LCLS AND VERY STEEP MID-LEVEL
   LAPSE RATES...TORNADIC SUPERCELLS WILL CONTINUE TO BE LIKELY.  A
   COUPLE OF STRONG TORNADOES WILL REMAIN LIKELY.  OTHERWISE...DMGG
   WINDS AND VERY LARGE HAIL WILL ALSO BE POSSIBLE.
   
   MEANWHILE...TO THE S ACROSS EXTREME SRN AR INTO GREENVILLE...
   GREENWOOD MS AREAS...OR ALONG S OF ROUTE 82...THE SVR WEATHER
   THREAT...IF ANY...WILL LIKELY NOT OCCUR UNTIL AFTER DARK.
   
   A COLLABORATION CALL WITH LOCAL WFOS IN AR NWD INTO MO WILL BE
   CONDUCTED SOON TO DISCUSS POTENTIAL WATCH REPLACEMENTS AS 
   NEIGHBORING TORNADO WATCH /WT 293/ TO THE NORTH EXPIRES.
   
   ..RACY.. 05/10/2008
   
   
   ATTN...WFO...MEG...JAN...LZK...SHV...
   
   33339326 34059402 34929340 35079225 35409119 35948982
   35588870 34558830 33878904 33499021 33219144 33219279 
   
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