CTP posted to Facebook…
520 AM 1/16/2022: A significant "Nor'Easter," one type of East Coast snowstorm (ECS), will affect the entire eastern seaboard today into Monday. Note the track/path of the center of the low pressure area (noted as a red "L" on the maps attached) will cross PA from south to north, likely just to the west of the Mainstem Susquehanna River. This track is usually one which allows a great deal of warm air to be drawn in from the Atlantic Ocean, and deeper (farther west) into PA. This results in much more mix precipitation and plain rain than would a track which would follow the NJ coast or the Delaware River. The track of the low has become much more certain over the past two days. Thus, any earlier forecasts which allowed for extreme amounts of snow over the Susq Valley are looking like they will not come to fruition. Usually, as we get closer to a (potential) storm, the forecasts improve in timing and precipitation type and amounts. This storm, and how the forecast has evolved over the last few days, is a good example of why we ask that you "stay tuned" and "check back for updates." This is especially true when there are many days to go before a storm could arrive. So, please do not latch on to the first forecast you see, especially if it is just a snowfall amount map. So many things can change regarding the interactions of all the meteorological conditions which influence a storm over the course of many days.