The latest European Ensemble shows probability of 6″ or more of snowfall accumulation increasing 70 to 80% across the northern and western suburbs.

Current probability of 3″ or more has increased 70 to 100% across the northern and western suburbs

The upper-level disturbance responsible for inducing cyclogenesis will reach the Puget Sound tomorrow during the late-afternoon hours which means that the operational models we look at should have a better handle on where the surface low develops and its most likely track.