Storm Prediction Center Mesoscale Discussion 1464

   Mesoscale Discussion 1464
   NWS Storm Prediction Center Norman OK
   0555 PM CDT Thu Jun 26 2025

   Areas affected...portions of southeastern Pennsylvania to the
   DelMarVa and southern New Jersey

   Concerning...Severe Thunderstorm Watch 464...

   Valid 262255Z - 270030Z

   The severe weather threat for Severe Thunderstorm Watch 464
   continues.

   SUMMARY...Damaging gusts will remain possible across the Mid
   Atlantic this evening.

   DISCUSSION...Across northeastern portions of WW464, a cluster of
   thunderstorms has gradually taken on a more linear appearance early
   this evening. The environment ahead of these storms is largely
   pristine with moderate to large buoyancy and modestly steep
   low-level lapse rates amid weak vertical shear. This will continue
   to support strong updrafts with this convection through the early
   evening hours. Additional storm development/intensification into a
   loose QLCS appears likely as storms propagate east/southeastward
   along a remnant coastal boundary. Locally greater forcing along this
   boundary, and a strengthening cold pool should allow for increased
   forward  propagation of the entire linear cluster. This suggests a
   continued damaging gust threat is likely, particularly from southern
   NJ, to eastern MD/PA and DE this evening.

   ..Lyons.. 06/26/2025

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

   ATTN...WFO...PHI...AKQ...CTP...LWX...

   LAT...LON   39667675 40077642 40337565 39927492 39507447 39067474
               37947534 38077621 38507651 38937679 39367685 39667675 

   MOST PROBABLE PEAK WIND GUST...55-70 MPH