NOAA is forecasting snow in Washington State next week.

Snow levels may drop as low as 5,500′ on Monday.

"Snow levels will drop to between 5000 and 5500 feet early Monday." 
- NOAA Seattle, WA today

This snowfall forecast is even showing up on NOAA’s snowfall probability maps.

NOAA Forecast Discussion:

A frontal system will bring a good shot of rain Sunday. Rain is
expected to spread onto the coast in the morning and into the
interior in the afternoon. Rain will change to showers Sunday
evening behind the front. Shower activity will be somewhat limited
behind the front Sunday night but should increase Monday as the
main upper trough swings through. Snow levels will drop to between
5000 and 5500 feet early Monday.
- NOAA Seattle, WA today