Reservoir Report

Sly Creek reservoir

California, USA USBR
Today high
--
Tonight low
--
Current storage
46,353acre-ft
% of normal
-16%
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Right now · current storage
Sly Creek
USBR · SLC
46,353 acre-ft
As of 2026-05-12
Seasonal avg
55,140
Record max
64,470
24h change
-1.6%
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Sly Creek -- None reservoir
Sly Creek None
About this reservoir

Sly Creek

Sly Creek Reservoir is a man-made lake located in the northern Sierra Nevada mountain range of California. The history of the reservoir began in 1960 when the Feather River Hydroelectric Project was constructed. The reservoir is primarily used to generate hydroelectric power, store water for downstream agricultural and municipal use, and provide recreational opportunities such as fishing, boating, and camping. The Sly Creek watershed, which feeds the reservoir, is predominantly forested and consists of granite outcrops and meadows. The watershed is also home to several important plant and animal species, including the Pacific fisher and northern goshawk. The reservoir’s primary source of water is from snowpack, which typically begins to melt in April and peaks in May or June. The reservoir is a vital component of California’s water supply system and plays an important role in meeting the state’s water demands.

StateNone
OperatorUSBR
Site IDSLC
Percent of normal-16%
Last updated2026-05-12
Records since2003
Storage trends

Daily levels at Sly Creek

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

Storage

acre-ft · code 2

Pool Elevation

ft · code 1

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 Sly Creek -- inflows here typically show up in storage 24-72 hours later.

Track Sly Creek 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 Sly Creek

Where does the data for Sly Creek 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.

More reservoirs

Other water bodies near here

Snoflo-tracked reservoirs and dams within driving distance of Sly Creek.

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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