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)

Tonight: Mostly clear in the evening then becoming mostly cloudy. Lows in the mid 50s. South winds 10 to 15 mph and becoming southeast up to 5 mph after midnight.

Saturday: Partly cloudy in the morning then becoming sunny. Highs in the mid 70s to lower 80s. South winds up to 5 mph and Becoming west 5 to 15 mph in the afternoon.

Saturday Night: Mostly clear in the evening then becoming partly cloudy. Patchy fog after midnight. Lows in the mid 50s. Northwest winds 5 to 15 mph.

Sunday: Partly cloudy in the morning then becoming sunny. Highs in the upper 70s to mid 80s. Light winds and becoming west 5 to 10 mph in the afternoon.

Sunday Night: Mostly clear. Lows in the mid 50s. West winds 5 to 15 mph and becoming southwest up to 5 mph after midnight.

Monday: Partly cloudy in the morning then becoming sunny. Highs in the 80s.

Monday Night and Tuesday: Mostly clear. Lows in the mid 50s. Highs in the 80s to lower 90s.

Tuesday Night: Clear. Lows in the upper 50s.

Wednesday: Partly cloudy in the morning then becoming sunny. Highs in the mid 80s to lower 90s.

Wednesday Night: Clear. Lows in the upper 50s.

Thursday through Friday: Mostly clear. Highs in the 80s to lower 90s. Lows in the upper 50s.

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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