"Weather forecasters predict this may be a storm unlike one we've seen in many years". Inslee declared a state of emergency over the storm.
It was 9 degrees in Arlington, Washington early Sunday.
Not only will we deal with this uncertainty in precipitation type, but there will also be areas of stronger lift that will cause isolated higher amounts of snowfall in the areas that see mainly snow.
About 50,000 residents are said to have lost power across the state, U.S. media report.
Snow was expected to push into the Puget Sound area later Sunday afternoon and continue into the early overnight hours, the weather service said. The city is set for another storm Friday into Saturday, as are the areas around the rest of western Washington State.
The sun was out on Sunday morning but the National Weather Service says snow will return late in the afternoon into the evening across the Northwest.
Storm Erik leaves some homes & businesses in Donegal without power
Met Éireann has declared Storm Erik is to hit Ireland and raised its weather warnings to Status Orange for parts of Ireland. There were also warnings of possible power cuts, large waves in coastal areas, fallen trees, and a risk of flying debris.
The Seattle Police Department tweeted that additional resources have been dedicated to getting the homeless community to warm shelters. The storm will then wind down Tuesday evening with any snow coming to an end before midnight Wednesday.
Schools and offices closed early in the Seattle area, and commuters swarmed the roads in an effort to get home before the heaviest snow arrived. A California man died in rough waters off of Maui on February 8, Hawaii News Now reported. "Use light rail if you are in Seattle".
Residents in Portland and Seattle who are more accustomed to rain than snow waited in long lines to buy shovels and de-icer.
In Tualatin, Ore., resident Autumn Sang was mobbed during a visit to a grocery store to stock up on supplies. She grew up in southern OR, where snow is more common, and wasn't fazed by the forecast.
But more snow was possible for the region by midweek, the report said. "I think that Portlanders, majority are city people and they come from a lot of different places, so they're not so used to it".