Western Flows

San Gabriel River

Above Whittier Narrows Dam, CA Stream Gauge USGS: 11087020 Provisional Data Last Updated: May 26, 08:22 PM PT

Current Flow

24.7 cfs
Rising
No Water Temp Probe

Expected Weather

Temp --°F
Wind -- mph
Rain Chance --%
Pressure -- hPa

Location

Basin: San Gabriel County: Los Angeles Elevation: 219 ft Drainage Area: 442.0 mi²

System Insights

  • Flow has risen more than 12% in the past 4 hours. Conditions are changing rapidly at this location.

  • Real-time flow is running well below current model projections. Conditions may be changing faster than the forecast anticipated.

Verify access, permits, and local conditions before entering any waterway.

Today's Weather

Forecast Details

Morning

At 6 AM: 62°F and Overcast, wind SE at 3 mph. By 10 AM: 66°F and Overcast, wind S at 4 mph.

Afternoon/Evening

At 2 PM: 70°F and Overcast, wind SW at 8 mph. By 6 PM: 66°F and Overcast, wind SW at 10 mph.

Overnight

Dropping from 59°F at 10 PM to 58°F by 4 AM. Conditions Overcast with wind S at 3 mph.

3-Day Outlook

🌔 Waxing Gibbous

Today, May 26

☁️

71° / 59°

Chance of Rain: 1%
5:43 AM 7:54 PM

Wednesday, May 27

☁️

67° / 55°

Chance of Rain: 4%
5:43 AM 7:55 PM

Thursday, May 28

☁️

70° / 50°

Chance of Rain: 10%
5:43 AM 7:55 PM

Flow Trend & 7-Day Forecast

Source: USGS

The current cfs of 25 CFS is running below the historical median of 43 CFS for this date, indicating lower-than-average seasonal water levels.

Current (CFS)
7-Day Forecast
Historical Median

7-Day Water Temperature (°F)

Source: USGS

Temperature Data Unavailable

The USGS does not maintain an active temperature probe at this gauge location.

Planning a Trip?

Recommended gear for your next river adventure. Affiliate links — we may earn a commission.

Glossary & Methodology

Cubic Feet per Second (CFS)

The standard measure for streamflow. One CFS is equal to one cubic foot of water flowing past a specific point in one second (about 7.48 gallons).

Acre-Foot (AF)

The volume of water needed to cover one acre of land to a depth of one foot. One acre-foot is exactly 325,851 gallons.

Snow Water Equivalent (SWE)

The amount of water contained within the snowpack. It can be thought of as the depth of water that would theoretically result if you melted the entire snowpack instantaneously.

Data Sources

Live metrics and historical medians are aggregated directly from the US Geological Survey (USGS), California Data Exchange Center (CDEC), and National Resources Conservation Service (NRCS). Daily flow statistics represent provisional records and are subject to agency revision.