MESOSCALE DISCUSSION 0910
   NWS STORM PREDICTION CENTER NORMAN OK
   0805 PM CDT TUE MAY 13 2008
   
   AREAS AFFECTED...PARTS OF CNTRL TX INTO ERN OK
   
   CONCERNING...TORNADO WATCH 311...
   
   VALID 140105Z - 140230Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 311 CONTINUES.
   
   PARTS OF WW MAY BE EXTENDED LOCALLY OR REPLACED WITH A NEW WW BY
   02Z.
    
   MID/UPPER FORCING FOR CONTINUING CONVECTIVE DEVELOPMENT DEEP INTO
   THE EVENING HOURS IS STILL UNCLEAR...PARTICULARLY ACROSS PARTS OF
   CENTRAL/EASTERN OKLAHOMA.  BUT...ISOLATED/WIDELY SCATTERED
   SUPERCELLULAR STORMS ARE ONGOING WITHIN A NARROW TONGUE OF MODERATE
   TO STRONG INSTABILITY...ALONG A LINGERING PRE-FRONTAL LOW-LEVEL
   THERMAL RIDGE AXIS.  AND...THE RISK FOR LARGE HAIL/LOCALIZED
   DAMAGING WIND GUSTS...PERHAPS AN ISOLATED TORNADO...IN THE PRESENCE
   OF STRONG DEEP LAYER SHEAR MAY CONTINUE AT LEAST THROUGH 02-03Z. 
   BEYOND THAT TIME...THE MORE RAPID LOSS OF DAYTIME HEATING PROBABLY
   WILL CONTRIBUTE TO DIMINISHING TRENDS.
   
   ..KERR.. 05/14/2008
   
   
   ATTN...WFO...TSA...FWD...OUN...SJT...
   
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