Those looking for snow last night were a bit disappointed when they woke up this morning in the city. North and west, especially across elevated areas, was a different story. Snowfall totals last night ranged from trace amounts along 422 to as much as four inches in parts of Northampton County and farther north into the Poconos, the winners in an elevation snowfall that arrived a bit earlier than modeled and tracked a bit more northwest than modeled, which yielded more snow farther north over the Poconos and Lehigh Valley than locally.
This event was the wintertime equivalent of a summer thunderstorm -- mesoscale components were the driver in intensity of precipitation and those are hard to pin down in specifics until the day of although the general idea can often be picked up in advance. Modeling had a pretty good idea this was going to move through, with the Euro and GFS showing something like this for a few days, but it arrived in a couple of hours earlier than modeled to our west and those couple of hours, on a day where temperatures managed to jump into the middle and upper 50's through much of the region, made the difference in lower elevated areas. However, those spots with elevation and in that heavier band of precipitation were able to overcome those time and temperature obstacles and coax a nice snowfall.