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Western Washington forecast

Showers mixed with sunshine today and more sun Thursday. Wet Friday with snow in the mountains. A sunny weekend but much cooler!!

PUGET SOUND FORECAST:

Off and on showers mixed with sunshine today. Highs in the low to mid-50s. North to northwest winds becoming north 10-20 mph.  

DISCUSSION:

A weak weather system moved in from the northwest overnight and continues to bring us showers to start the day. The showers will continue off and on through most of the day mixed with sunshine. 

Snow levels should drop to around 3,000 feet by this afternoon and we could see 1-3” of snow accumulate today – mainly above 3,000 ft (above Snoqualmie Pass). 

High pressure will build in briefly later today for clearing skies tonight. As the skies clear out, temperatures will dip into the upper 30s to mid-40s Saturday morning. Thursday will be a mostly sunny but cool day. 

A stronger weather system will push into the state on Friday for a rainy and cool day. This system may lower snow levels to about 2,000 feet on Friday with 3-8” of snow possible during the day with the higher amounts at the higher elevations. This may impact pass travel especially in the afternoon. 

Showers in the mountains and the lowlands will decrease overnight Friday as high pressure builds in giving us a sunny but chilly weekend with daytime highs only in the mid to upper 40s (the normal high you would expect in December and January). Overnight lows will be in the mid 30s to low 40s on Saturday morning but dropping to low to mid 30s Sunday and Monday mornings with some outlying areas dropping into the upper 20s. It could be a little frosty on Sunday and Monday mornings. 

A broad area of high pressure will settle in over the Pacific just to our west through much of next week for sunshine and gradually warmer temperatures with highs back into the mid to upper 50s and low mostly in the 40s by midweek.