Puget Sound Forecast:  Rain at times throughout the evening tonight. Snow levels near 1,000 feet with the exception of the NW Interior (0 ft elevation) and areas ESE of Renton. Lows tonight in the low to mid 30s. Highs tomorrow in the low 40's. Winds south 5-15 mph. 

Coast Forecast: Rain showers throughout the evening. Temperatures down in the upper 30s overnight. Back in the 40s tomorrow with showers and sun-breaks throughout the day. 

Mountain Forecast: WINTER STORM WARNING & WINTER WEATHER ADVISORY UNTIL 6AM WEDNESDAY. 

Increasing snow becoming heavy at times later today. Snow level near 1,000 tonight. Snow accumulation of 6-18 inches by Wednesday morning. Afternoon pass temperatures in the mid-20's and low 30's. West winds in the passes 5 to 15 mph.

Eastern Washington Forecast: Scatters snow flurries tonight. Temperatures down in the 20s overnight. Climbing into the lower 30s Wednesday.

DISCUSSION:

Winter continues around western Washington. This new weather system is spreading rain and snow across Washington this evening. Snow levels are near 1,000 feet tonight but could drop around 500 feet this evening. There are a few spots that could see snow below the 500 foot level. Those areas are north of Skagit County, and another will be east southeast of Renton. Areas like Maple Valley, Black Diamond, and Enumclaw could see some winter precipitation overnight tonight but it doesn't look like we'll get much in the way of accumulation. 

Showers should decrease in most areas early on Wednesday, except for the convergence zone primarily north and east of Seattle. Showers in that area may produce accumulations of several inches of wet snow Wednesday morning before the showers end and skies begin to clear Wednesday afternoon. 

High pressure will produce a dry northerly flow later Wednesday and give us a partly to mostly sunny day on Thursday as the high moves through. 

On Friday another stronger system will drop down the B.C. coast for increasing rain or snow on Friday. Snow levels will begin around 1,000 feet but drop to 500 feet by later Friday with rain or snow showers continuing into Saturday with snow levels staying around 500 feet. Showers will decrease on Sunday as a little drier air moves in but snow levels will drop down near sea level probably staying near 200 feet. As the air mass dries more on Monday on a few flurries will be left with snow levels staying between sea level and 200 feet to start the last week of February. 

Right now Tuesday and Wednesday should be partly to mostly sunny but it will remain cool. 

Jordan Steele / KING 5 Meteorologist