And as we shift from our two month pattern of generally moderate to warm to an upcoming stretch of cooler than normal temperatures, the atmosphere is getting pretty antsy about it.
After a windy morning up north and along the coast (with wind gusts to 45-55 mph, including a gust to 56 mph in Oak Harbor) we're now seeing a cold, unstable air mass begin to move in, and that's touched off some heavy showers and isolated thunderstorms.
For the Puget Sound area, the timing couldn't have been much worse, as a drenching rain combined with winds gusting to 35-45 mph made for an awful time to be driving or just outdoors in general.
The 520 Bridge reported a gust to 46 mph while the University of Washington reported a peak gust of 44 mph. Over on the Puget Sound shores, a gust of 56 mph was recorded at Alki Beach and 45 mph was recorded at West Point Lighthouse off Magnolia.
The storm knocked out power to 2,800 Seattle City Light customers for a brief time, most in Shoreline. Puget Sound Energy also had some 40,000 customers in the dark. About 1,500 of the affected customers were in Kenmore where power has since been restored. A separate outage occurred near Bremerton.
In North Seattle, a tree fell on power lines at Densmore Ave. N. And N. 122nd St., blocking traffic and cutting power to area residents.
A downed tree blocked the three northbound lanes of Interstate 5 near Lakeview in Seattle around 11 p.m.
Further south, a major power transmission line failed that left 5,600 customers of Peninsula Light in the dark -- nearly all of the Key Peninsula. Power officials have not said if that failure was weather related.
The DOT reported trees blocked both directions of SR-3 near Bayshore Drive outside of Shelton and also at the SR-302 junction south of Port Orchard. US-101 was also blocked near Hamma Hamma Monday evening due to downed trees.
Mason County PUD 3 reported an outage affecting some 2,000 customers in the wake of the storm. Service was restored by 9:40 p.m.
And about 30,000 people were left in the dark in Kitsap County with no word on when power might be restored.
Over on the coast, strong thunderstorms rolled in with Hoquiam getting a gust of 64 mph as a cell blew though. Astoria and Illwaco also reported lightning with the storm.
Wind will gradually calm down overnight with showers still out there but decreasing in intensity. Lows in the upper 30s.
Tuesday will see rain at times with breezy winds to 25-35 mph, but not as active as today. Highs will be in the low-mid 40s.
But this is just the opening act in what appears to be a change to a colder weather pattern up ahead, with even chances of lowland snow popping into the forecast for the end of the week and weekend. Check the KOMO Weather Center for the latest forecast.