Seattle weather: Heavy rainfall this weekend for some

- Thursday will bring more afternoon sunshine, but cool temperatures for Western Washington, as the area gears up for an atmospheric river this weekend.

Expect decreasing cloud cover for Thursday with plenty of afternoon sunshine.

The full moon will be low and appear large on the horizon tonight. The Hunter's Moon will be 222,055 miles from Earth, which is the closest Supermoon of the year. It's named the Hunter's Moon because it was considered a signal for hunters to prepare for the long winter.

Saturday, an atmospheric river will drop south into Western Washington, bringing significant rainfall to the Washington Coast and the Olympic Peninsula. 1 to 2 inches of rain is possible in the lowlands, 2 to 3 inches in the Washington Cascades, and 3 to 6 inches in the Olympics and North Cascades.

Breezy winds will also move in with this system, with gusts up to 40 mph on the coast and usual windy spots in the north Puget Sound.

If you're heading to one of the many sports events this weekend, be prepared for rain. Friday, Saturday and Sunday will be wet.

Things should dry out Tuesday and Wednesday next week with partly to mostly sunny skies. Temperatures will remain below normal in the greater Seattle area.