CNRFC - Hydrology - Observed River/Reservoir Conditions

End of River Group

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		Bulletin Group: Central Coast		River Group: South Bay

Monitor Stage: 9.0 Feet

Flood Stage: 10.5 Feet

Plot Type:

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
2022*	1,510	6.14	Dec 24, 2022
2021*	1,480	6.09	Jan 27, 2021
2020*	687	4.45	Nov 26, 2019
2019*	3,220	9.15	Jan 16, 2019
2018*	632	4.31	Jan 9, 2018
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

Impacts - E19 Information
9.0 Feet	Additional flow from Canoas Creek watershed or increased reservoir spills may bring river to flood stage.
10.5 Feet	River begins to overtop upstream of Alma Avenue bridge into the Elk's Lodge, spilling north, as well as near the RxR on the east bank.
11.5 Feet	River continues to overtop upstream of Alma Avenue bridge into the Elk's Lodge, spilling north along Lelong Street. Alma Avenue/CA-87 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 are also at risk.
11.73 Feet	Historical high water mark, January 1995.
15.0 Feet	Flooding continues to spill near Alma Avenue, flowing northward and crossing under Willow Street and Alma Avenue viaducts, continuing to flow north. Overbanking occurs at Atlanta Avenue just upstream of CA-87. 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.
17.0 Feet	Washington/Guadalupe, Tamien and Alma/Almaden neighborhoods east of CA-87 inundated from floodwaters traveling under street viaducts from the west. Widespread flooding in the eastern Willow Glen neighborhood, as well as the Gardner and Atlanta/Bird neighborhoods. CA-87/I-280 interchange at risk from overland flow spilling on the roadway. Possible overtopping of the Guadalupe River near Capitol Expressway on the east side, flowing towards Pearl Avenue. Additionally, possible overtopping near Thousand Oaks Park and upstream of Branham Lane flowing along streets flooding businesses and the Erickson neighborhood. If flood is sustained or increasing, car dealerships along Capitol Expressway may be inundated as well. Potential flooding on Ross and Canoas Creeks due to high backwater caused by the Gaudalupe River.

Official 7 Day National Weather Service Forecast (CAZ513)

Rest of Today: Sunny. Highs in the upper 70s. Northwest winds 15 to 20 mph.

Tonight: Clear. Lows around 50. Northwest winds 10 to 20 mph and Becoming 5 to 10 mph after midnight.

Thursday: Sunny. Highs in the upper 70s. Northwest winds 10 to 20 mph.

Thursday Night: Mostly clear. Lows in the lower 50s. Northwest winds 15 to 20 mph decreasing to 5 to 10 mph after midnight.

Friday: Sunny. Highs in the upper 70s. Northwest winds 5 to 15 mph.

Friday Night: Mostly clear in the evening then becoming mostly cloudy. Lows in the lower 50s.

Saturday: Mostly cloudy. A chance of rain. Highs in the mid 60s.

Saturday Night: Mostly cloudy in the evening then becoming partly cloudy. A slight chance of rain. Lows in the mid 40s.

Sunday and Sunday Night: Mostly clear. Highs in the mid 60s. Lows in the mid 40s.

Monday through Tuesday: Partly cloudy. Highs around 70. Lows in the upper 40s.

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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