MESOSCALE DISCUSSION 0674
   NWS STORM PREDICTION CENTER NORMAN OK
   0522 PM CDT SAT MAY 02 2009
   
   AREAS AFFECTED...N/CNTRL MS AND AL
   
   CONCERNING...TORNADO WATCH 227...
   
   VALID 022222Z - 022315Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 227 CONTINUES.
   
   TORNADO THREAT CONTINUES ACROSS MUCH OF WW227...WITH A DMGG WIND
   THREAT LIKELY INCREASING AS WELL ACROSS WRN PORTIONS OF THE WATCH
   OVER THE NEXT FEW HOURS. AREAS TO THE EAST OF THE CURRENT WATCH ARE
   BEING MONITORED...AND A NEW WW MAY NEED TO BE ISSUED.
   
   CONVECTION IS GRADUALLY INCREASING ACROSS N/CNTRL MS AND AL IN
   RESPONSE TO A VORT MAX OVER NRN MS. DEVELOPMENT HAS PRIMARILY BEEN
   FOCUSED ALONG LINGERING OUTFLOW BOUNDARIES SOUTH OF A
   QUASI-STATIONARY FRONT. UPSTREAM 21Z SHV SOUNDING SHOWS A NEARLY
   UNCAPPED AIRMASS AND STEEP MID LEVEL LAPSE RATES...WHICH ARE
   GRADUALLY BEING SPREAD EWD INTO THE WATCH AREA. STRONGER MID LEVEL
   WINDS WILL LIKELY ACCOMPANY THE VORT MAX AS IT TRANSITIONS EWD...AND
   IN COMBINATION WITH STEEPENING MID LEVEL LAPSE RATES AND A
   MODERATELY UNSTABLE AIRMASS...STORMS WILL LIKELY CONTINUE TO
   INCREASE IN SEVERITY. CURRENT OBS REFLECT GENERALLY SLY WINDS AT THE
   SURFACE...WHICH WILL CONTINUE TO SUPPORT TORNADIC
   DEVELOPMENT...ESPECIALLY AS WIND FIELDS IMPROVE WITH TIME. IN WRN
   PORTIONS OF THE WATCH...A DMGG WIND THREAT WILL INCREASE AS STRONGER
   CONVECTION TO THE W CONTINUES TO PROPAGATE TOWARDS INCREASINGLY
   UNSTABLE AIR. FURTHERMORE...AREAS TO THE E OF THE WATCH ARE BEING
   MONITORED FOR INCREASES IN DEVELOPMENT...AND A NEW WW MAY NEED TO BE
   ISSUED.
   
   ..HURLBUT.. 05/02/2009
   
   
   ATTN...WFO...FFC...BMX...HUN...MEG...JAN...LZK...
   
   LAT...LON   32389111 34149103 34978595 34798519 33948506 33328528
               32389111