ZCZC SPCSWOMCD ALL ACUS11 KWNS 020027 SPC MCD 020027 MEZ000-MAZ000-NHZ000-RIZ000-CTZ000-VTZ000-NYZ000-NJZ000-PAZ000-020630- Mesoscale Discussion 0053 NWS Storm Prediction Center Norman OK 0627 PM CST Mon Feb 01 2021 Areas affected...northeastern Pennsylvania...southern New York State...and southern New England Concerning...Heavy snow Valid 020027Z - 020630Z SUMMARY...An extensive band of moderate to heavy snow is expected to continue across the discussion area though the evening and overnight hours. Rates of up to 2 inches per hour are possible in localized areas - particularly in central/eastern Massachusetts and southern New Hampshire. DISCUSSION...A persistent band of precipitation continues on the northeastern periphery of a mid-level vorticity maximum located over the DelMarVa. This band has produced occasional areas of 2-4 inch-per-hour snow rates at times due to strong ascent/warm advection in the 925-700mb layer and sub-freezing surface temperatures (especially in inland areas). A mix/changeover to sleet and freezing rain has been noted across the New York City Metro area through central Long Island, southern Rhode Island and eastern Massachusetts where slightly warmer low-level profiles has allowed for melting of precipitation aloft. Over time, models and mesoanalyses indicate that the axis of lift (and associated heavier precipitation) will lift northeastward in tandem with northward movement of a deepening surface low south of Long Island. Though occasional 1-inch-per-hour rates will remain possible across portions of southern New York through the evening, the main focus of heavier precipitation (including 2-inch-per-hour snowfall rates) will translate northeastward into eastern Massachusetts and southern New Hampshire through 03-06Z. The transition zone between snow and freezing rain/sleet will also migrate northward in tandem with low-level warming, across portions of central Connecticut through far southeastern New Hampshire. ..Cook.. 02/02/2021 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...GYX...BOX...OKX...ALY...PHI...BGM... LAT...LON 43437067 43367140 43127241 42947287 42407422 41647526 40817530 40527494 40747399 41427268 41747168 42547093 43297046 43437067 NNNN