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Heavy snow band approaching Long Island as NWS considered upgrade to Winter Storm Warning:

Here is the radar up to 9:46 AM, and the following is from the NWS: The combination of an exit region of an upper jet and increased thermal forcing will allow snow to overspread the rest of the area from SW to NE today. Up to 2 inches of snow have already fallen in some of the southern zones. Have increased snowfall forecast slightly in these areas, and might need to increase them further with the next update. 12z NAM QPF implies warning criteria snowfall (average of 6 inches within a 12 hour period) by late afternoon. Latest couple of HRRR runs brings QPF amounts just shy of warning criteria for the same area with the axis of heaviest QPF just offshore. This is shaping up to be a close call, and complicating matters is that sleet is expected to mix in for some southern zones by late afternoon. Have decided to keep with an advisory for these areas at this point. At least for the time being can message heavier snow bands with SPSs before making any headline changes.


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