Reservoir Report

Lake Chelan At Chelan reservoir

Washington, USA USGS
Today high
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Tonight low
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Current storage
1,099ft
% of normal
1%
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Next 24 hours
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Right now · current storage
Lake Chelan At Chelan
USGS · 12452000
1,099 ft
As of 2026-07-05
Seasonal avg
1,093
Record max
1,100
24h change
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Lake Chelan At Chelan -- Washington reservoir
Lake Chelan At Chelan Washington
About this reservoir

Lake Chelan At Chelan

Lake Chelan is a natural lake located in Chelan, Washington, and is approximately 50.5 miles long. The lake was formed over 10,000 years ago by a glacier and has a maximum depth of 1,486 feet. Lake Chelan is fed by several streams, including the Stehekin River, and is the main source of water for the surrounding area. The lake's hydrology is unique, as it is considered a closed basin, meaning it has no outlet to the sea. The lake's surface flow is regulated by the Chelan River Dam, which produces hydroelectric power. Snowpack providers for the lake are the North Cascades and the Chelan Mountains. The lake supports agricultural activities, including fruit orchards and vineyards. Recreation activities, such as boating, swimming, and fishing, are also popular in the area.

StateWashington
OperatorUSGS
Site ID12452000
Percent of normal1%
Last updated2026-07-05
Records since2007
Storage trends

Daily levels at Lake Chelan At Chelan

Storage volume, pool elevation, and total release plotted from the operating agency's daily observations.

Elevation of reservoir water surface above datum, ft

ft · code 00062

Detailed forecast

Plan around the weather

Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

5-day forecast table

Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Lake Chelan At Chelan -- inflows here typically show up in storage 24-72 hours later.

Around the water

Make a day of it

Boat launches, lakeside camping, fishing access, and other reservoirs near Lake Chelan At Chelan.

FAQ

About Lake Chelan At Chelan

Where does the data for Lake Chelan At Chelan come from?

Daily storage, pool elevation, and release rates are sourced from USGS, USBR, and USACE monitoring stations. Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.

How often is the report updated?

Storage observations are updated daily by the operating agency. The 15-day weather forecast refreshes throughout the day. Snoflo caches and renders the most recent observation -- check the "as of" timestamp on the storage card.

What does the Hazard hazard rating mean?

The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card below for the full definitions.

What's "% of normal"?

The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).

Can I get alerts when storage crosses a threshold?

Yes -- alerts are managed in the Snoflo iOS app. Favorite this reservoir, set a threshold, and you'll get a push the moment conditions cross.