Reservoir Report

Van Arsdale Reservoir 24hr Avg reservoir

California, USA USBR
Today high
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Tonight low
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Current storage
199acre-ft
% of normal
-5%
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Right now · current storage
Van Arsdale Reservoir 24hr Avg
USBR · VAR
199 acre-ft
As of 2026-05-11
Seasonal avg
210
Record max
877
24h change
0.5%
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Van Arsdale Reservoir 24hr Avg -- None reservoir
Van Arsdale Reservoir 24hr Avg None
About this reservoir

Van Arsdale Reservoir 24hr Avg

Van Arsdale Reservoir is located in Mendocino County, California, and is a crucial source of water for both agricultural and municipal purposes. It was created in 1958, as part of the Potter Valley Project, which involves diverting water from the Eel River into the Russian River. The reservoir has a capacity of 30,000 acre-feet and is fed by the East Branch Russian River, which is primarily supplied by snowmelt from the Mendocino National Forest. In addition, the reservoir receives water from the diversion tunnel that connects it to the Eel River. The 24-hour average for the reservoir is closely monitored by the Sonoma County Water Agency, which manages the water supply for multiple county agencies, including agricultural and recreational users.

StateNone
OperatorUSBR
Site IDVAR
Percent of normal-5%
Last updated2026-05-11
Records since2007
Storage trends

Daily levels at Van Arsdale Reservoir 24hr Avg

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 Van Arsdale Reservoir 24hr Avg -- inflows here typically show up in storage 24-72 hours later.

Track Van Arsdale Reservoir 24hr Avg 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 Van Arsdale Reservoir 24hr Avg

Where does the data for Van Arsdale Reservoir 24hr Avg 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.

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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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