Storm Prediction Center Mesoscale Discussion 23

   Mesoscale Discussion 0023
   NWS Storm Prediction Center Norman OK
   0855 AM CST Sat Jan 17 2026

   Areas affected...northern NJ into southwest New England

   Concerning...Heavy snow 

   Valid 171455Z - 171800Z

   SUMMARY...Transient heavy snow is expected to shift northeastward in
   the Northeast to southwest New England through early afternoon.
   Rates should briefly reach 1 inch per hour before waning.

   DISCUSSION...A confined band of moderate to heavy snow with several
   half to quarter-mile visibilities ongoing across mainly southeast
   PA, north-northwest of the Philadelphia Metro Area, in association
   with a shortwave impulse progressing northeastward across the
   Northeast. 12Z observed and forecast soundings indicate the
   dendritic growth zone is centered between 575-650 mb. Ascent within
   and below this level appears likely to peak through about 18Z, which
   should favor snowfall rates around 1 in/hr. This should be transient
   at any one location as the burst of heavy snow shifts northeastward
   followed by drying in the dendritic growth layer.

   ..Grams.. 01/17/2026

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

   ATTN...WFO...GYX...BOX...OKX...ALY...PHI...BGM...

   LAT...LON   40787433 40517507 40807529 41777433 42797315 43027244
               42917200 42527218 42057256 41367348 40787433