CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

JAMES BYPASS - SAN JOAQUIN (JAMC1)

Latitude: 36.65º N	Longitude: 120.18º W	Elevation: 170 Feet
Location: Fresno County in California		Bulletin Group: San Joaquin		River Group: San Joaquin

Issuance Time:

Dec 25 2025 at 2:10 PM PST

Next Issuance:

Dec 26 2025 at 9:00 AM PST

Action/Monitor: N/A

Minor Flood: N/A

Moderate Flood: N/A

Major Flood: N/A

Plot Type:

Please Note:
1) Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.

Observed Data Credit
	Raw streamflow data is provided by the San Luis and Delta-Mendota Water Authority. View San Luis and Delta-Mendota Water Authority Data for this station location.

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ306)

Tonight: Rain showers and slight chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Near steady temperature in the mid 50s. Southeast winds 10 to 15 mph. Chance of precipitation 90 percent.

Friday: Rain showers likely and slight chance of thunderstorms in the morning, then rain showers and slight chance of thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall. Highs in the upper 50s. Southeast winds 5 to 10 mph. Chance of precipitation 90 percent.

Friday Night: Mostly cloudy. Chance of rain in the evening. Lows in the mid 40s. Southeast winds around 5 mph. Chance of rain 50 percent.

Saturday: Partly sunny. Highs in the lower 50s. Northwest winds up to 10 mph.

Saturday Night: Partly cloudy. Lows in the lower 40s. Northwest winds up to 5 mph.

Sunday: Mostly cloudy in the morning then clearing. Highs in the upper 40s.

Sunday Night through Tuesday Night: Partly cloudy. Lows in the upper 30s. Highs around 50.

Wednesday and Wednesday Night: Mostly cloudy. Highs in the lower 50s. Lows in the lower 40s.

New Years Day: Partly sunny with a 30 percent chance of rain. Highs in the lower 50s.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS San Joaquin Valley-Hanford Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

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Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.