Henshaw reservoir
Henshaw
Henshaw Reservoir is located in San Diego County, California, and was constructed in 1923 by the San Diego Flume Company. The reservoir is fed by the Santa Rosa Creek and the San Luis Rey River, which are important sources of water for agricultural use in the region. Henshaw Reservoir also stores water for recreational purposes, including fishing and boating. The hydrology of the area is influenced by the seasonal precipitation, and the snowpack in the mountains, which melt and run into the reservoir. The surface flow is monitored by the San Diego County Water Authority and the California Department of Water Resources. The reservoir also serves as a habitat for several species of fish and bird.
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 Henshaw -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Santa Ysabel C Nr Ramona Ca | 0 cfs | → |
| Guejito C Nr San Pasqual Ca | 0 cfs | → |
| Santa Maria C Nr Ramona Ca | · | → |
| Temecula C Nr Aguanga Ca | · | → |
| Santa Margarita R Nr Temecula Ca | 7 cfs | → |
| Rainbow C Nr Fallbrook Ca | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Henshaw.
Boat launches
- Highway 76 26439, Santa Ysabel
- Sutherland Dam Road 21568-21722, Ramona
- Vail Lake Boat Ramp
- Lake Hodges Boat Launching Area
- Warren Road 37701, Temecula
- Lake Miramar
Campgrounds
- Crestline Picnic Area
- Crestline Group Campground
- Indian Flats Campground
- Atáxam Mámta’Ash Campground (Indian Flats)
- Indian Flats
- Observatory Campground
Fishing spots
Paddle runs
- Forest Boundary, Above Zoo Creek Below Spillway (S1/2, Sec 3, T11s, R2e) To La Jolla Indian Reservation Boundary (N1/2, Sec 31, T10s, R2e)
- Confluence Of Fry And Iron Spring Creeks (E1/2, Sec 3, T10s,R1e To Se1/4 Sec 16, T10s, R2e
- Santa Margarita River
- Crouch Ranch To Morena Reservoir
- Palm Canyon
More reservoirs
Track Henshaw 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").
About Henshaw
Where does the data for Henshaw 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.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Henshaw.