Reservoir Report

Donner Lake reservoir

California, USA USBR
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Right now · current storage
Donner Lake
USBR · DNN
-- acre-ft
Latest observation from the operating agency.
Seasonal avg
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Record max
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24h change
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Donner Lake -- None reservoir
Donner Lake None
About this reservoir

Donner Lake

Donner Lake is a freshwater lake located in the Sierra Nevada Mountains in California, USA. The lake was named after the Donner Party, a group of pioneers who became stranded in the area during the winter of 1846-47. The hydrology of the lake is primarily fed by the Donner Creek, which flows into the Truckee River. Snowmelt from the surrounding mountains also contributes to the lake's water supply. Donner Lake is known for its clear, blue waters and recreational activities such as boating, fishing, and camping. The lake has been used for irrigation in the past, but it is primarily a recreational destination for tourists and locals alike. The snowpack surrounding the lake is essential to the water supply in the region, and the lake plays a critical role in the hydrology of the Truckee River watershed.

StateNone
OperatorUSBR
Site IDDNN
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 Donner Lake -- inflows here typically show up in storage 24-72 hours later.

Track Donner Lake in the Snoflo app

Save this reservoir as a favorite and set push alerts when storage crosses a threshold (e.g. "alert me at 80% of normal").

FAQ

About Donner Lake

Where does the data for Donner Lake 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 above 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.

Premium feature

Favorites and alerts are part of Snoflo Premium. Save reservoirs, set storage thresholds, and get push notifications when conditions cross.

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this reservoir, set a threshold, and you'll get a push the moment conditions cross.

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