Another upper-level low pressure system off British Columbia will be moving toward northern reaches of Western Washington through Monday, bringing more clouds and a few rain showers.  

The chance for showers will increase along the north coast, the Strait and areas north and west of Seattle later this afternoon.  Many areas will stay dry and even a few pockets of brief sunshine will be seen.  With the  persistent cloud cover, highs will be in the 60s.

Rain chances increase by around sundown as the upper low gets closer.  Again, the best chance for rain will be north and west of Seattle, but a shower is possible this evening area-wide.

By the wee hours of Monday morning, the core of the cold upper low skirts our northern counties inbound to the north Cascades before daybreak.  Some heavier downpours are likely along and near the path of the low, meaning the best chance for these rains will be north of Seattle, and especially north of Everett.   There is a chance of thunder, but instability is not great for our region so significant amounts of lightning is not expected across the north overnight.  Farther south through Seattle and downstate, only light, widely scattered showers are expected.

As the cold upper low moves toward and into the North Cascades tonight, snow levels there will briefly be lowered to 6,500 feet through mid-morning Monday.  Light accumulating snows are possible above that elevation, quickly melting.

By Monday afternoon, expect mainly cloudy skies and a few lingering showers.  Highs will be in the mid-to-upper 60s.

A gradual warming trend starts Tuesday with all rain out of the forecast for the President's visit.  Tuesday will start mainly cloudy then turn partly sunny with highs in the lower 70s.   More sunshine and warmer temperatures will follow for the remainder of the week.