MESOSCALE DISCUSSION 0484
   NWS STORM PREDICTION CENTER NORMAN OK
   0622 PM CDT TUE APR 27 2004
   
   AREAS AFFECTED...WRN WA
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 272322Z - 280115Z
   
   ISOLATED TSTMS DEVELOPING ALONG PSCZ AND AHEAD OF STRONG COLD FRONT
   COULD POSE A THREAT OF DAMAGING WINDS AND SMALL HAIL OVER THE NEXT
   COUPLE OF HOURS.
   
   RADAR COMPOSITE IMAGERY WAS INDICATING A BACKBUILDING SEGMENT OF
   LINEAR CONVECTION INCREASING ALONG STRONG PUGET SOUND CONVERGENCE
   ZONE ACROSS NRN KING COUNTY. POTENT UPPER TROUGH WILL CONTINUE TO
   AID DEEP ASCENT ACROSS THE REGION THROUGH EVENING WITH STRONG
   MESOSCALE FORCING RESULTING IN LOW-TOPPED TSTMS IN WEAKLY UNSTABLE
   ENVIRONMENT. AS MID LEVEL TEMPERATURES AND FREEZING LEVEL FALL
   RAPIDLY WITHIN THE MID LEVEL TROUGH...A FEW OF THE STORMS COULD
   PRODUCE SMALL HAIL. IN ADDITION...ALREADY STRONG GRADIENT WINDS MAY 
   BE LOCALLY ENHANCED BY BOTH TOPOGRAPHY AND CONVECTIVE OVERTURNING
   RESULTING IN A FEW STRONGER...PERHAPS DAMAGING...WIND GUSTS.
   
   ..CARBIN.. 04/27/2004
   
   
   ATTN...WFO...PDT...SEW...
   
   47172127 47082184 47022274 47412267 47742231 47792166
   47842125