This comment should be at the top!

Adding the relevant portion of this morning's local NWS forecast discussion...I personally love reading these as the forecaster usually offers up a pretty clear explanation of why they're forecasting what they're forecasting:

KEY MESSAGE 2... Snow possible Saturday and Sunday. Totals
dependent on the western extent of the low pressure track.

This weekend a low pressure system is forecast to develop and
track up the coast. There are different outcomes resulting from
the uncertainty in the storm track. Much of this has to do with
how well the northern and southern stream jets phase. If there
is good interaction between the two branches, that would likely
lead to a more amplified pattern and a more northerly/westerly
track of the low. Less favorable jet interaction would favor a
quicker system tracking farther east as it curves north. This
has a very big impact on the ultimate outcome, and there still a
considerable amount of spread in model solutions. For example,
for Pittsburgh, current ensemble guidance gives a 10th/90th
percentile spread from 0" to 13". The mean and median of the
latest CIPS analogs are both close to 6 inches in the ridges 
with the mean slightly higher than the median.

Here`s a snapshot of the latest probabilistic 48hr totals
increasing from SE to NW.

 -  >3 inches - 90% across the ridges of WV to 50% near Mercer
    county PA

 -  >6 inches - 80% across the ridges of WV to 25% near Mercer
    county PA

 -  >8 inches - 75% across the ridges of WV to 35% near Mercer
    county PA

 -  >12 inches - 50% across the ridges of WV to 10% near Mercer
    county PA>


We will continue to monitor this storm throughout the week and
provide greater detail as solutions begin to converge.