The disturbance over the Pacific Ocean that will be responsible for the eventual exact storm track of the Nor’easter early next week is currently forecast to reach the Puget Sound Saturday around 6PM EST. At that time the operational forecast models will have the most accurate sampling data. I would not be surprised to see Winter Storm Watches issued for portions of the Mid-Atlantic and New England Saturday afternoon or evening if the current trends continue.
Watch how last nights run of the GFS (06z/1 am EST) models how this disturbance may interact with the deepening trough that is forecast to dive into the midwest before becoming vertically stacked and negatively tilted over the Northeastern corridor:
Historically the ideal track for Washington’s biggest snow storms is the “Cape Hatteras to Cape Cod track”. Currently, the GFS and European ensembles are beginning to suggest this possibility.