Storm Prediction Center Mesoscale Discussion 2226

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   Mesoscale Discussion 2226
   NWS Storm Prediction Center Norman OK
   1013 PM CDT Thu Sep 03 2026

   Areas affected...Portions of the Mid-Atlantic

   Concerning...Severe Thunderstorm Watch 649...652...

   Valid 040313Z - 040445Z

   The severe weather threat for Severe Thunderstorm Watch 649, 652
   continues.

   SUMMARY...Multiple areas of strong-to-severe thunderstorms capable
   of damaging winds will continue this evening and into the overnight
   hours.

   DISCUSSION...Multiple clusters of strong-to-severe thunderstorms are
   ongoing across portions of the Mid-Atlantic this evening and should
   continue into the overnight. 

   One such cluster is the remnants of a small bowing segment that
   moved southeast out of Pennsylvania and is currently approaching
   Baltimore, MD. Another, larger cluster, is stretched along a line
   from easter West Virginia, northern Virginia, and parts of Maryland
   and moving south-southeast. A third area extends northwest to
   southeast from northern Virginia toward southern Chesapeake Bay
   area. 

   The environment across the region remains unstable with MUCAPE
   ranging from 2000-3000 J/kg with deep-layer shear around 35 knots,
   which will be more than sufficient to sustain thunderstorms into the
   overnight hours. Additionally, despite low-level lapse rates being
   weaker than during the afternoon/evening, DCAPE values around
   1000-1200 J/kg will be more than sufficient for damaging outflow
   winds and perhaps a couple damaging downbursts. 

   At present the most likely corridor of damaging wind potential looks
   to be along and ahead of the linear MCS moving south-southeast
   across northern Virginia. This region looks to remain west of the
   developing warm-air advection showers, is largely undisturbed by
   previous convection, and lies ahead of a sufficiently organized MCS
   that has a history of producing wind damage. A southwestward
   extension of Severe Thunderstorm Watch #652 may be necessary.

   ..Marsh.. 09/04/2026

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

   ATTN...WFO...PHI...AKQ...LWX...PBZ...RLX...

   LAT...LON   39038024 39357981 39477860 39537696 39547622 39437532
               39207461 39027436 38607438 38177464 37887538 37837660
               38267846 38828000 39038024 

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

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