As predicted, the snow is here. But right now it looks like it will hold in for several more hours..roughly 10 PM..which means several more inches. One of the most valuable tools in these situations is the profiler at Sand Point in Seattle. The latest graphic is attached. Temperatures have cooled aloft (this is virtual temperature in centigrade, subtract one degree approximately to give the regular temp). 1C--which mean freezing-- was at roughly 300 m and dropping...that is why snow is falling to sea level now. SW winds are increasing aloft in the figure...and that will bring warm air down eventually...but it is going to take several hours to do so.
Take a look at the latest obs (see attached)...cool temps everywhere..even at coastal stations. (Note if you click on the graphics they will expand for easier viewing) Finally, the latest computer forecasts suggest the snow holding to around 10 PM.
The bottom line is that snow could well range from 1-4 inches, perhaps more in favored higher locations. Kitsap will get more.
Very strong SE winds are over SE Washington and near Destruction Is on the coast. As described in my book, this pattern of strong winds is due to the influence of the Olympics.