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
Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months.
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025*	1,017	5.56	Feb 14, 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)

Today: Mostly cloudy in the morning then becoming sunny. Highs around 60. South winds 10 to 15 mph.

Tonight: Mostly clear in the evening then becoming partly cloudy. Lows in the upper 30s to mid 40s. Southeast winds 5 to 15 mph.

Sunday: Partly cloudy. Highs in the mid 60s. South winds 5 to 10 mph.

Sunday Night: Partly cloudy in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the mid 40s. Light winds.

Monday: Partly cloudy in the morning then becoming mostly cloudy. Patchy fog in the morning. Highs in the upper 60s. Light winds and becoming southwest around 5 mph in the afternoon.

Monday Night: Rain likely. Lows in the lower 50s.

Tuesday and Tuesday Night: Rain likely. Highs in the mid 60s. Lows in the lower 50s.

Wednesday: Mostly cloudy. A chance of rain. Highs in the upper 60s.

Wednesday Night: Mostly cloudy. Patchy fog. A chance of rain. Lows around 50.

Thursday: Mostly cloudy. A slight chance of rain. Highs around 70.

Thursday Night and Friday: Partly cloudy. Lows around 50. Highs in the lower 70s.

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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