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River Flows & Lake Levels

River flows as of Jan. 21

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Cowlitz River below Mayfield Dam – about 14,100 cubic feet per second (cfs)
Mayfield flow forecast (typically updated on Monday and Thursday afternoons) as of Thursday, Jan. 20: We plan to maintain the current discharge through Friday and then decrease the discharge down to about 12,000 cfs during the weekend.

Nisqually River below LaGrande Dam – 2,250 cfs

Wynoochee River above Black Creek – 2,600 cfs

Wynoochee River at Grisdale – 1,260 cfs

Green River at Palmer (Tacoma Water’s headworks) – 3,520 cfs

North Fork Skokomish River below Cushman Dam No. 2 – 483 cfs

Check out water safety resources. River flows can change at any time.

Subscribe to available Water Alerts provided by the US Geological Survey.

Lake levels and boat launches as of Jan. 21

Riffe Lake – 744.7 feet of elevation (maximum of approx. 749 ft)
Learn about changes to Riffe Lake levels.
Mossyrock Park boat launch – one lane is open; the dock is usable, weather-permitting (we may need to remove it if the weather gets too volatile). The day-use area is open.
Taidnapam North boat launch is open.
Kosmos boat launch and parking lot are closed.
Taidnapam Park boat launch is closed.

Alder Lake – 1,204.27 feet of elevation (maximum of 1,207 ft)
Alder Lake Park boat launch and day-use area are open.
Rocky Point boat launch, day-use area, and campground are open.

Mayfield Lake – may fluctuate 4 feet weekly, between 421 and 425 feet of elevation (maximum of 425 ft)
Mayfield Lake Park boat launch and day-use area are open.

Lake Cushman – 722.29 feet of elevation (maximum of 738 ft)
The Lake Kokanee boat launch is open.
Get information about Skokomish Park at Lake Cushman.

Wynoochee Lake –  770.55 feet of elevation (maximum of 800 ft)
The day-use area is open.

Coho Campground and boat launch are closed. They are typically open from mid-May to October.

Get current campfire rules on the Parks & Recreation homepage.