Western Flows

Middle Fork San Joaquin River

Near Mammoth Lakes, CA Stream Gauge USGS: 11224000 Provisional Data Last Updated: Jul 10, 05:17 AM PT

Current Flow

80.6 cfs
Steady

Water Temp

54.0 °F
Safe (< 65°F)

Expected Weather

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

Location

Flow is within the typical range for this time of year (25th–75th percentile, based on 15 years of USGS record).

System Insights

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Today's Weather

Forecast Details

Morning

At 6 AM: 54°F and Clear, wind W at 1 mph. By 10 AM: 72°F and Clear, wind SW at 10 mph.

Afternoon/Evening

At 2 PM: 76°F and Clear, wind SW at 14 mph. By 6 PM: 73°F and Clear, wind SW at 14 mph.

Overnight

Dropping from 59°F at 10 PM to 59°F by 4 AM. Conditions Clear with wind W at 2 mph.

3-Day Outlook

🌘 Waning Crescent

Today, Jul 10

☀️

76° / 53°

Chance of Rain: 0%
5:43 AM 8:19 PM

Saturday, Jul 11

☁️

80° / 59°

Chance of Rain: 0%
5:44 AM 8:19 PM

Sunday, Jul 12

🌧️

80° / 56°

Chance of Rain: 5%
5:45 AM 8:18 PM

7-Day Flow History

Source: USGS

The current cfs of 81 CFS is running near the historical median of 65 CFS for this date, indicating average seasonal water levels.

Current (CFS)
Historical Median
Normal Range (p25–p75)

7-Day Water Temperature (°F)

Source: USGS
Current (°F)
Historical Median
68°F Threshold

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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.