Little Rock Reservoir reservoir
Little Rock Reservoir
Little Rock Reservoir is a man-made reservoir located in the San Gabriel Mountains of California. Constructed in 1956, the reservoir is fed by runoff from nearby mountains and snowpack during the winter. The reservoir has a capacity of 19,200 acre-feet and serves as a vital source of water for the surrounding communities, including the cities of Palmdale and Lancaster. The surface flow is provided by the Little Rock Creek, which is a tributary of the Mojave River. The snowpack providers include the San Gabriel Mountains and the surrounding areas. Little Rock Reservoir also supports agricultural activities in the surrounding area, including irrigating crops such as grapes, almonds, and pistachios. Recreational activities, such as hiking and fishing, are also popular in the area.
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 Little Rock Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Rock C Nr Valyermo Ca | 21 cfs | → |
| Arroyo Seco Nr Pasadena Ca | 2 cfs | → |
| San Gabriel R Bl Santa Fe Dam Nr Baldwin Pk Ca | · | → |
| Big Tujunga C Bl Hansen Dam Ca | · | → |
| Rio Hondo Ab Whittier Narrows Dam Ca | 1 cfs | → |
| San Gabriel R Ab Whittier Narrows Dam Ca | 10 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Little Rock Reservoir.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Little Rock Reservoir
Where does the data for Little Rock Reservoir 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.