Active pattern continues. Unlike Monday’s storm, this bring more of a mix of wintry precipitation. Snow and ice forecast is below this discussion.

Low pressure will track into Ohio Valley tonight. Strong, cold high pressure over Queebec, will force this low weaken and transfer south of Long Island. With cold air place tonight, everyone will see snow at the onset. However, enough warm air is expected to surge aloft, for a mix or changeover to sleet and freezing rain by sunrise. During the day tomorrow, sleet and freezing rain should to rain for all coastal sections. While inland areas could see more snow, sleet and freezing continuing throughout the day.

Despite strong high pressure and cold-air damming, the 850mb and 925mb lows are tracking near the OH/PA border. This forces warm to eventually surge into mid-levels. At the same time, we seeing more where more frontogenetic forcing  The models show strong 500-700mb vertical velocities, entering the tri-state area tonight. This will enhance snowfall rates to 1 inch per hour and keeping the column cooler, for several hours. Any delay in the changeover, will result in higher snowfall totals for that area.

Snow will mix with sleet than changeover to sleet and freezing rain for NYC and coastal sections between 4am – 7am.  Inland areas the changeover will take longer. Icing will significant for inland areas. This will to treacherous driving and might be enough bring down tree branches and power lines. I will update these forecasts if guidance or observations warrant: But a severe, widespread damaging ice storm is not expected.

I will update this maps, tonight or tomorrow. If new guidance or observations warrant.  There’s also another storm  brewing for this weekend or early next week. I will discuss that more as we get closer.