Tulloch reservoir
Tulloch
Tulloch is a reservoir located in the Sierra Nevada Mountains of California. It was created in 1955 with the construction of the Tulloch Dam on the Stanislaus River. The reservoir has a total capacity of 83,000 acre-feet and is used to provide irrigation water for agriculture and to generate hydroelectric power. The hydrology of the area is heavily impacted by the snowpack in the surrounding mountains, which provides a significant amount of the surface flow into the reservoir during the spring and summer months. The lake is a popular destination for recreational activities such as boating, fishing, and camping. The surrounding area is also home to many vineyards and orchards that rely on the irrigation water provided by the reservoir.
Daily levels at Tulloch
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
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.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
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.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Tulloch -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Black C Nr Copperopolis Ca | · | → |
| Modesto Cn Nr La Grange Ca | 1,210 cfs | → |
| Tuolumne R Bl Lagrange Dam Nr Lagrange Ca | 157 cfs | → |
| Turlock Cn Nr La Grange Ca | 1,650 cfs | → |
| Big C Ab Whites Gulch Nr Groveland Ca | 0 cfs | → |
| Tuolumne R A Modesto Ca | 126 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Tulloch.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Tulloch
Where does the data for Tulloch 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 below 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.