CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

GUADALUPE RIVER - SAN JOSE AT US HIGHWAY 101 (GSJC1)

Latitude: 37.37º N	Longitude: 121.93º W	Elevation: 72 Feet
Location: Santa Clara County in California		Bulletin Group: Central Coast		River Group: South Bay

Issuance Time:

Dec 25 2025 at 2:02 PM PST

Next Issuance:

Dec 26 2025 at 9:00 AM PST

Action/Monitor: 17.0 Feet

Minor Flood: 18.5 Feet

Moderate Flood: 19.5 Feet

Major Flood: 21.0 Feet

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 US Geological Survey (USGS). View US Geological Survey (USGS) Data for this station location.

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
21.0 Feet	Major Flooding: Levee overtopping, with failures likely along both sides of the river between US-101 and Trimble flowing in a northerly direction.
20.0 Feet	Moderate Flooding: Levee overtopping imminent. Highest risk areas are between US-101 and Trimble.
19.0 Feet	Minor Flooding: High flows with heavy debris might cause localized blockages to cause overtopping of levees.
17.0 Feet	Action Stage: 7256 cfs

Official 7 Day National Weather Service Forecast (CAZ513)

rest of Tonight: Showers likely and a slight chance of thunderstorms. Some thunderstorms may be severe with heavy rainfall. Lows in the upper 40s. South winds 10 to 20 mph. Gusts up to 40 mph late in the evening.

Friday: A chance of showers in the morning, then showers likely in the afternoon. Highs in the mid 50s. Southeast winds 5 to 15 mph.

Friday Night: Mostly cloudy. A slight chance of thunderstorms in the evening. A chance of showers. Some thunderstorms may produce heavy rainfall in the evening. Lows in the mid 40s. Southeast winds 5 to 10 mph.

Saturday: Mostly cloudy in the morning then becoming partly cloudy. A slight chance of showers in the morning. Highs in the mid 50s. Northwest winds 5 to 10 mph. Chance of showers 20 percent.

Saturday Night: Clear except for frost after midnight. Lows in the upper 30s. North winds around 5 mph.

Sunday: Partly cloudy in the morning then becoming sunny. Highs in the mid 50s.

Sunday Night through Wednesday: Mostly clear. Lows in the upper 30s. Highs in the lower 60s.

Wednesday Night: Partly cloudy. A slight chance of showers. Lows in the lower 40s.

New Years Day: Partly cloudy in the morning then becoming mostly cloudy. A chance of showers. Highs in the upper 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 Francisco Bay Area-Monterey 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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