CNRFC - Hydrology - Observed River/Reservoir Conditions

GUADALUPE RIVER - SAN JOSE AT ALMADEN EXPRESSWAY (GUDC1)

Latitude: 37.28º N	Longitude: 121.88º W	Elevation: 150 Feet
Location: Santa Clara County in California		River Group: Central Coast

Monitor Stage: 9.0 Feet

Flood Stage: 10.5 Feet

Observed Data Credit
	Raw streamflow data is provided by the Santa Clara Valley Water District. View SCVWD Data for this station location.

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025*	1,830	7.36	Feb 13, 2025
2024*	1,611	7.39	Feb 4, 2024
2023*	3,120	9.04	Jan 9, 2023
2022*	1,510	6.14	Dec 24, 2022
2021*	1,480	6.09	Jan 27, 2021
Historical High Stage/Flow Events (Period of Record - Jan 1975 to Present) - Ranked by Flow
1995*	8,470	11.73	Jan 09, 1995
1999*	6,780	10.50	Dec 3, 1998
* Discharge affected by regulation or diversion

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ513)

rest of Today: Sunny. Highs in the 70s. Northwest winds 10 to 15 mph.

Tonight: Mostly clear. Lows around 50. Northwest winds 5 to 10 mph.

Wednesday: Sunny. Patchy fog in the morning. Highs in the upper 70s. Northwest winds around 5 mph increasing to 10 to 15 mph in the afternoon.

Wednesday Night: Mostly clear in the evening then becoming partly cloudy. Areas of fog after midnight. Lows in the lower 50s. Northwest winds 5 to 15 mph.

Thursday: Mostly cloudy in the morning then becoming partly cloudy. Areas of fog in the morning. Highs in the mid 70s. Light winds and becoming southwest 5 to 10 mph in the afternoon.

Thursday Night: Partly cloudy in the evening then becoming mostly cloudy. Patchy fog. A chance of showers. Lows in the mid 50s.

Friday: Areas of fog. Showers likely and a slight chance of thunderstorms. Highs around 70.

Friday Night through Saturday Night: Mostly cloudy. A chance of rain. Lows in the upper 40s. Highs in the upper 60s.

Sunday: Mostly cloudy. A chance of rain. Highs in the lower 60s.

Sunday Night and Monday: Partly cloudy. Lows in the lower to mid 40s. Highs in the upper 60s.

Flood Impacts
12.0 Feet	Major Flood Stage. Flooding continues to spill near Alam Avenue, flowing northward and crossing east under Willow Street and Alma Avenue viaducts, continuing to flow north. Overbanking occurs at Atlanta Avenue just upstream of CA87. The Willow Glen Neighborhood bounded by Willow Street and Minnesota Avenue see overland flooding. Overbanking occurs in various locations between Alma Avenue and Willow Glen Way. Potential flooding on Ross and Canoas Creeks due to high backwater caused by Guadalupe River.
11.73 Feet	Historical High Water - January 1995
11.0 Feet	Moderate Flood Stage. River continues to overtop upstream of Alma Avenue Bridge into the Elks Lodge, spilling north along Lelong Street. Alma Avenue/CA87 viaduct is flooded. Creek overbanks west near Minnesota Avenue downstream of Alma Avenue. Properties south of the old UPRR alignment in the Northern Cross Neighborhood also at risk.
10.5 Feet	Minor Flood Stage. River begins to overtop upstream of Alma Avenue Bridge into the Elks Lodge, spilling north , as well as near the RxR on the east bank.
9.0 Feet	Action Stage: Additional flow from Canoas Creek watershed or increased reservoir spills may bring river to flood stage.

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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