SIGNIFICANT SNOWFALL POTENTIAL FRIDAY NIGHT ******1ST CALL MAP****** 🎄 Merry Christmas to YOU!!! A pretty sizable snowstorm is expected across the region Friday night, with snow developing as early as Friday evening. I am very confident in a widespread 6–10" snowfall for a large portion of the Tri-State area,... with lower confidence closer to NYC, Long Island, and the Jersey Shore where mixing remains a concern. At this time, I am keeping some mixing in play in central NJ/Long Island, but I’m not totally sold on how aggressive it becomes. While 4–6" looks like a very solid floor, several areas could easily boom to 6"+ if colder air locks in faster and holds longer than currently modeled. ZONE 1 – 6–10" OF SNOW This is the zone where cold air damming will be most prevalent, allowing snow to remain all snow for the duration of the event. Expect higher snow ratios, which could allow many areas to push toward double-digit totals, especially under any persistent banding. I could easily pull this zone into NYC and Nassau County as we see more model data. ZONE 2 – 4–6" OF SNOW This zone will likely start with heavy, wet snow, before transitioning to a lighter, fluffier snowfall as colder air works in. Some compaction is expected with lower snow ratios, but additional snow and mesoscale banding could still drive totals toward or above 6" in spots. ZONE 3 – 2–4" WITH MIXING This zone remains VERY uncertain. I could make a strong argument that cold air advection dominates, keeping this mostly snow and allowing totals to reach 4–6". However, low-level warm air transport on an easterly wind may introduce sleet, especially along the Jersey Shore (east of GSP) and into Suffolk County, which would eat into accumulations. I’ll be watching trends closely as this is shaping up to be a sharp cutoff storm where small shifts could have big impacts. 📺 On TV now with the latest on PIX11 Newsshow more

Mike Masco

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