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		River Group: Central Coast

Monitor Stage: 7.5 Feet

Flood Stage: 9.5 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
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
2017*	1,701	6.45	Feb 7, 2017
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. Highs around 60. Northwest winds 5 to 10 mph.

Tonight: Rain likely in the evening, then showers after midnight. Lows in the mid 40s. Southwest winds 5 to 10 mph and Becoming southeast 10 to 20 mph after midnight.

Tuesday: Breezy, showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 50s. Southeast winds 20 to 30 mph.

Tuesday Night: Showers in the evening, then showers likely after midnight. Lows in the lower 40s. Southeast winds around 20 mph with gusts to around 35 mph and becoming 10 to 15 mph after midnight.

Wednesday: Showers likely. Highs in the upper 50s. West winds 5 to 10 mph. Chance of showers 70 percent.

Wednesday Night: Mostly cloudy. A slight chance of showers. Lows in the mid 40s.

Thursday: Mostly cloudy in the morning then becoming partly cloudy. Highs around 60.

Thursday Night and Friday: Partly cloudy. Lows in the lower 40s. Highs around 60.

Friday Night through Saturday Night: Mostly clear. Lows in the upper 30s. Highs in the upper 50s.

Sunday: Sunny in the morning then becoming partly cloudy. Highs around 60.

Impacts - E19 Information
7.5 Feet	Additional flow from Canoas Creek watershed or increased reservoir spills may bring river to flood stage.
9.5 Feet	River begins to overtop upstream of Alma Avenue bridge into the Elk's Lodge, spilling north.
11.5 Feet	River continues to overtop upstream of Alma Avenue bridge into the Elk's Lodge, spillilng 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. Thousand Oaks Park is also at risk of flooding.
11.73 Feet	Historical high water mark, January 1995.
14.0 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.
15.5 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 between Branham and Capitol, mainly on the east side with water flowing through streets. Areas along Thousand Oaks Park and near Capitol Expressway at risk of overbanking. If flood is sustained or increasing, car dealerships along Capitol Expressway are inundated. The Thousand Oaks neighborhood experiences significant street flooding and overtopping occurs near Branham Lane, as well as flooding businesses and the Erickson neighborhood. Potential flooding on Ross and Canoas Creeks due to high backwater caused by the Guadalupe River.

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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