MESOSCALE DISCUSSION 0822
   NWS STORM PREDICTION CENTER NORMAN OK
   1237 PM CDT THU MAY 08 2008
   
   AREAS AFFECTED...NRN AL...NW GA INTO ERN TN
   
   CONCERNING...TORNADO WATCH 277...
   
   VALID 081737Z - 081900Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 277 CONTINUES.
   
   PRE-SQUALL LINE BOUNDARY LAYER NORTH OF BIRMINGHAM...AND
   PARTICULARLY NORTH OF THE TENNESSEE RIVER INTO MIDDLE/EASTERN
   TENNESSEE...WITH THE EXCEPTION OF THE WESTERN SLOPES OF THE
   APPALACHIANS...REMAINS RAIN-COOLED/STABILIZED.  AND...CLOUD COVER
   FROM APPROACHING CONVECTION WILL PROBABLY PRECLUDE SIGNIFICANT
   FURTHER DESTABILIZATION.  BUT...AT LEAST AN ELEVATED MOISTENING AND
   FORCING ON THE SOUTHERN FRINGE OF THE SHORT WAVE IMPULSE LIFTING
   THROUGH KENTUCKY/TENNESSEE WILL LIKELY MAINTAIN VIGOROUS SQUALL LINE
   INTO AREAS NEAR/NORTHEAST OF LOOKOUT MOUNTAIN BY AROUND 20Z. 
   LOW-LEVEL SHEAR NEAR THE NOSE OF A 40-50 KT LOW-LEVEL JET WILL
   REMAIN SUFFICIENT FOR A RISK FOR TORNADOES IN SUPERCELLS WITHIN THE
   SQUALL LINE...BUT DAMAGING STRAIGHT LINE WINDS MAY BE THE PRIMARY
   SEVERE THREAT...WITH SOME HAIL ALSO POSSIBLE.
   
   ..KERR.. 05/08/2008
   
   
   ATTN...WFO...MRX...FFC...OHX...BMX...HUN...
   
   34908723 35258699 35488637 35478529 35028500 34618510
   34268533 33978566 33758618 33698656 33708741 33838774
   33898785