Western Flows

Middle Fork San Joaquin River

Near Mammoth Lakes USGS: 11224000 Provisional Data Last Updated: May 14, 06:10 PM PT

Current Flow

480.0 cfs
Falling

Water Temp

44.4 °F
Safe (< 65°F)

Expected Weather

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

Location

Basin: Cottonwood Creek County: Madera Elevation: 7,570 ft Drainage Area: 43.8 mi²
Flow is above average for this time of year (above the 75th percentile, based on 15 years of USGS record).

System Insights

  • Elevated above typical. Higher than 75% of historical years for this date.

  • Water temperature is 44°F — below 50°F, the threshold associated with cold shock risk for immersion.

  • Flow has risen from below the 25th percentile to above the 75th percentile over the past 7 days (193.0 → 480.0 cfs).

  • Real-time flow is running well above current model projections. On-the-ground conditions are outpacing the forecast.

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

Today's Weather

Forecast Details

Morning

At 6 AM: 42°F and Clear, wind NE at 4 mph. By 10 AM: 58°F and Clear, wind NW at 3 mph.

Afternoon/Evening

At 2 PM: 63°F and Clear, wind SW at 12 mph. By 6 PM: 58°F and Clear, wind SW at 10 mph.

Overnight

Dropping from 48°F at 10 PM to 44°F by 4 AM. Conditions Clear with wind SW at 2 mph.

3-Day Outlook

🌘 Waning Crescent

Today, May 14

☀️

64° / 39°

Chance of Rain: 3%
🌅 5:47 AM 🌇 7:58 PM

Friday, May 15

☀️

58° / 42°

Chance of Rain: 4%
🌅 5:46 AM 🌇 7:58 PM

Saturday, May 16

☁️

61° / 39°

Chance of Rain: 1%
🌅 5:45 AM 🌇 7:59 PM

Flow Trend & 7-Day Forecast

Source: USGS
Current (CFS)
7-Day Forecast
Historical Median
Normal Range (p25–p75)

Flow ranged from 191.0 to 630.0 CFS over the past 7 days. Current flow is 480.0 CFS. The historical median for this date is 320.5 CFS.

7-Day Water Temperature (°F)

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

Water temperature ranged from 37.9°F to 51.3°F over the past 7 days. Current temperature is 44.4°F.

Nearby Gauges