Storm Prediction Center Mesoscale Discussion 1374

   Mesoscale Discussion 1374
   NWS Storm Prediction Center Norman OK
   0559 PM CDT Thu Jun 19 2025

   Areas affected...Western to central Maine

   Concerning...Severe Thunderstorm Watch 443...

   Valid 192259Z - 200100Z

   The severe weather threat for Severe Thunderstorm Watch 443
   continues.

   SUMMARY...An intense line segment and a few developing supercells
   will continue to pose a severe hail/wind risk for the next 1-2 hours
   across western to central Maine.

   DISCUSSION...Recent GOES imagery shows intensifying updrafts within
   a convective band across northwest/western ME, as well as the
   development of a couple of supercells across west-central ME over
   the past hour. This is occurring as the band and weak mid-level
   ascent impinge on a buoyancy axis spanning from New England into
   northwestern ME. This corridor of 1000-1500 J/kg MLCAPE is fairly
   narrow based on visible imagery with stable billow clouds noted
   across central ME where temperatures remain in the low 70s. As such,
   the potential for severe hail/wind gusts will likely be most
   widespread over the next couple of hours before convection moves
   into the more stable air mass. However, well-established
   mesocyclones, such as the one embedded within the convective line,
   will continue to pose at least an isolated severe threat through 03
   UTC across the eastern extent of WW 443.

   ..Moore.. 06/19/2025

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

   ATTN...WFO...CAR...GYX...

   LAT...LON   45147060 45657021 46237015 46416985 46466937 46376886
               46226859 45936848 45636845 45196867 44606964 44437009
               44407041 44577081 44797090 44997080 45147060 

   MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH
   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN