Reservoir Report

El Capitan Res Nr Lakeside Ca reservoir

California, USA USGS
Today high
--
Tonight low
--
Current storage
642ft
% of normal
-7%
Loading current conditions…
Right now · current storage
El Capitan Res Nr Lakeside Ca
USGS · 11020600
642 ft
As of 2026-05-12
Seasonal avg
690
Record max
745
24h change
0.0%
Loading storage history…
Loading next 24 hours…
Loading 7-day outlook…
El Capitan Res Nr Lakeside Ca -- None reservoir
El Capitan Res Nr Lakeside Ca None
About this reservoir

El Capitan Res Nr Lakeside Ca

El Capitan Reservoir is located in Lakeside, California and was built in 1935 by the City of San Diego. The reservoir has a capacity of 112,800 acre-feet of water and is supplied by the El Capitan Dam on the San Diego River. The hydrology of the reservoir is primarily reliant on surface flow from the San Diego River and snowpack providers from the surrounding mountain ranges. The reservoir is used for agricultural purposes by local farmers and for recreational activities such as fishing, boating, and camping. Over the years, El Capitan Reservoir has been a source of controversy due to disputes over water rights and water usage in the region. Despite the challenges, the reservoir remains an important source of water for the region and a popular destination for outdoor enthusiasts.

StateNone
OperatorUSGS
Site ID11020600
Percent of normal-7%
Last updated2026-05-12
Records since2007
Storage trends

Daily levels at El Capitan Res Nr Lakeside Ca

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

Reservoir storage, acre-ft

ac-ft · code 00054

Lake or reservoir water surface elevation above NGVD 1929, ft

ft · code 62614

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.

Loading hourly forecast…
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
Loading detailed forecast…
Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

Loading 15-day outlook…
Regional inflow

Nearby streamflow gauges

USGS streamgauges around El Capitan Res Nr Lakeside Ca -- inflows here typically show up in storage 24-72 hours later.

Track El Capitan Res Nr Lakeside Ca 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 El Capitan Res Nr Lakeside Ca

Where does the data for El Capitan Res Nr Lakeside Ca 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 El Capitan Res Nr Lakeside Ca.

Premium feature

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

Upgrade to Premium Not now
🔔

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.

Open App Store