For those of us north of NYC, we are on the northern edge of the precipitation from the possible storm. Earlier today, the total precip was 1 1/2 inches. The later run of the computer forecast model has us with 3/4 of an inch, which would vary the amount of snow (if it’s all snow) by a range of 7 to 15 inches.
So there’s a lot of uncertainty being on the edge of a possible storm, several days in advance.
Areas closest to the likely center of the storm – DC, Philadelphia – are getting more certainty in their forecasts.
But there’s still quite a ways to go. The models will be get better at forecasting this storm as the pieces come over the upper air network over land.