A system that moved through the Pacific NW overnight helped to break down the West Coast ridge. The winds up high are still a little gusty. The ridge this week will sit off the Pacific NW coast around 130-140w. That will be too close to allow cold troughs to drop down from the North. A system will move through the Pacific NW Thursday and then down into the Rockies.
By next weekend a large area of low pressure and associated trough will dig down into the Eastern Pacific. That may help in building a ridge along the West Coast ahead of the system with slightly warmer temps next weekend. The trough will push towards the West Coast next week.
The forecast models are in pretty good agreement that the trough pushes into the West Coast by next Tuesday bringing a return to snowfall in the Sierra. It is still 8+ days away so lots of time to look at potential precip amounts over the next week.
After the initial front next Tuesday-Wednesday the forecast models show a potential for more precip through the end of the month. Some into the first week of April. The mean ridge position looks to stay up near Hawaii on the long-range ensemble runs potentially keeping the storm door open.