Lake Jennings reservoir
Lake Jennings
Lake Jennings is a reservoir located in San Diego County, California. It was constructed in 1962 to provide drinking water to the region. The lake has a capacity of 9,790 acre-feet and is fed by both surface flow and snowpack providers. The surface flow comes from the San Diego River, while snowpack providers include the Cuyamaca Mountains and the Laguna Mountains. The lake is managed by the Helix Water District and is also used for recreational activities such as fishing and camping. Additionally, the lake’s surrounding areas are used for agricultural purposes, including cultivating avocados and citrus fruits. Overall, Lake Jennings has played a significant role in providing water to the San Diego region and supporting various agricultural and recreational activities.
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 Lake Jennings -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Los Coches C Nr Lakeside Ca | 0 cfs | → |
| Sweetwater R A Dehesa Ca | · | → |
| San Diego R A Mast Rd Nr Santee Ca | 1 cfs | → |
| Santa Maria C Nr Ramona Ca | · | → |
| Los Penasquitos C Nr Poway Ca | 1 cfs | → |
| Jamul C Nr Jamul Ca | 10 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lake Jennings.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Lake Jennings
Where does the data for Lake Jennings 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.