Reservoir Report

Nacimiento reservoir

California, USA USBR
Today high
--
Tonight low
--
Current storage
285,131acre-ft
% of normal
9%
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Right now · current storage
Nacimiento
USBR · NCM
285,131 acre-ft
As of 2026-05-12
Seasonal avg
262,442
Record max
360,636
24h change
-0.3%
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Nacimiento -- None reservoir
Nacimiento None
About this reservoir

Nacimiento

Nacimiento Reservoir is located in Monterey County, California and was formed by the Nacimiento Dam in 1957. The reservoir has a capacity of 377,900 acre-feet and serves primarily as a water source for the Salinas Valley, which is an important agricultural region in California. The reservoir's hydrology is primarily fed by surface flow from the Nacimiento River, as well as snowpack melt from the surrounding Santa Lucia Mountains. The reservoir is also used for recreational activities such as boating, fishing, and camping. The surrounding terrain provides ample opportunities for hiking and wildlife viewing. The reservoir is managed by the Monterey County Water Resources Agency and is an important source of water for the region's agriculture and urban needs.

StateNone
OperatorUSBR
Site IDNCM
Percent of normal9%
Last updated2026-05-12
Records since2021
Storage trends

Daily levels at Nacimiento

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

Track Nacimiento 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 Nacimiento

Where does the data for Nacimiento 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 Nacimiento.

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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