Storm Prediction Center Mesoscale Discussion 268

   Mesoscale Discussion 0268
   NWS Storm Prediction Center Norman OK
   1035 PM CDT Wed Mar 26 2025

   Areas affected...Parts of nwrn WA

   Concerning...Severe Thunderstorm Watch 65...

   Valid 270335Z - 270500Z

   The severe weather threat for Severe Thunderstorm Watch 65
   continues.

   SUMMARY...Widespread convection and embedded weak thunderstorm
   activity lingers, but the potential for severe weather appears
   unlikely to increase.  Severe Thunderstorm Watch 65 may be allowed
   to expire at 9 PM PDT.

   DISCUSSION...Convective development, and embedded weak thunderstorm
   activity, persists along the western slopes of the Oregon Cascades. 
   However, the primary cluster of thunderstorm activity is now rapidly
   spreading with the more favorable mid/upper forcing for ascent 
   across and north-northwest of the Puget Sound vicinity.  Locally
   strong surface gusts might still be possible, but thermodynamic
   profiles characterized by rather modest to weak mid/upper lapse
   rates, and more limited low-level moisture than some model guidance
   indicated, appear to have mitigated the severe weather threat.

   ..Kerr.. 03/27/2025

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...SEW...

   LAT...LON   48802319 48752155 47612133 47162195 47512281 48262387
               48802319 

   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN