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Storm Prediction Center Mesoscale Discussion 1004

Published Date and Time: 2026-06-06 16:00:00



Mesoscale Discussion 1004
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   Mesoscale Discussion 1004
   NWS Storm Prediction Center Norman OK
   0257 PM CDT Sat Jun 06 2026

   Areas affected...central Pennsylvania into northern Maryland/West
   Virginia

   Concerning...Severe Thunderstorm Watch 278...

   Valid 061957Z - 062200Z

   The severe weather threat for Severe Thunderstorm Watch 278
   continues.

   SUMMARY...Severe threat continues within WW277 and WW278.

   DISCUSSION...Several clusters of thunderstorm activity continue
   across much of PA into northern MD/WV this afternoon. The strongest
   cluster to the south has produced winds around 60-75 mph over the
   last hour. Radar presentation continues to show 50-60 kt winds in
   the lowest 3-5 kft. Given continued warming/destabilization to the
   east, this will likely be where the greatest short term risk for
   severe winds 60-70+ mph. Additionally, strong to severe gusts will
   continue with the clusters to the north and east.

   ..Thornton.. 06/06/2026

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

   ATTN...WFO...PHI...CTP...LWX...PBZ...RLX...

   LAT...LON   39227844 39197873 39207941 39298027 39458019 39947931
               40267932 40877893 41097872 41607810 41687738 41467649
               41107636 40557638 39987654 39537706 39297789 39227844 

   MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN


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