Mesoscale Discussion 2024
   NWS Storm Prediction Center Norman OK
   0849 PM CST Sat Dec 11 2021

   Areas affected...portions of Massachusetts...southern New Hampshire

   Concerning...Severe potential...Watch unlikely 

   Valid 120249Z - 120445Z

   Probability of Watch Issuance...5 percent

   SUMMARY...A couple strong wind gusts may accompany a low-topped line
   of showers progressing across portions of New England over the next
   couple of hours. A WW issuance is not expected.

   DISCUSSION...Very strong deep-layer ascent associated with a 70+ kt
   LLJ, overspread by a 100-150 kt 300 mb jet streak, is contributing
   to the forcing of a low-topped line of showers. Current MRMS mosaic
   radar data shows 30 dBZ echoes struggling to reach 20 kft.
   Nonetheless, the GYX 00Z observed sounding depicted 50 kt wind
   speeds around 500 m AGL, suggesting that any efficient mechanical
   downward momentum transport within the low-topped line of showers
   may support continued strong wind gusts for the next few hours,
   until the line moves off shore. Nonetheless, buoyancy is negligible
   across New England. As such, organized/widespread severe winds seem
   unlikely, and a WW issuance is not expected.

   ..Squitieri/Grams.. 12/12/2021

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

   ATTN...WFO...GYX...BOX...BTV...ALY...

   LAT...LON   42287366 42847299 43257261 43357205 43447128 43407071
               42957043 42387037 42147065 42087129 42047209 42077265
               42147336 42287366