Reservoir Report

Prosser Creek Reservoir reservoir

California, USA USBR
Today high
--
Tonight low
--
Current storage
27,098acre-ft
% of normal
89%
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Right now · current storage
Prosser Creek Reservoir
USBR · PRS
27,098 acre-ft
As of 2026-05-13
Seasonal avg
14,349
Record max
30,841
24h change
-0.5%
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Prosser Creek Reservoir -- None reservoir
Prosser Creek Reservoir None
About this reservoir

Prosser Creek Reservoir

Prosser Creek Reservoir is a man-made lake in Nevada County, California. It was created in 1962 as part of the Prosser Creek Dam project by the United States Bureau of Reclamation. The reservoir has a capacity of 49,000 acre-feet and is operated for irrigation, flood control, and recreation purposes. The hydrology of the reservoir is mainly fed by the Prosser Creek along with tributaries from the surrounding mountains. The surface flow is mainly from snowmelt during the spring and early summer months. The snowpack providers are the Sierra Nevada mountains, which provide most of the water supply for the region. The reservoir provides water to agricultural lands in Nevada and Placer Counties and also serves as a popular recreational spot for boating, fishing, and camping.

StateNone
OperatorUSBR
Site IDPRS
Percent of normal89%
Last updated2026-05-13
Records since2004
Storage trends

Daily levels at Prosser Creek Reservoir

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

Track Prosser Creek Reservoir 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 Prosser Creek Reservoir

Where does the data for Prosser Creek Reservoir 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 Prosser Creek Reservoir.

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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