CNRFC - Hydrology - River Guidance - Graphical RVF

End of River Group

Location:

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

Issuance Time:

Apr 18 2024 at 7:21 AM PDT

Next Issuance:

Apr 19 2024 at 9:00 AM PDT

Monitor Stage: 9.0 Feet

Flood Stage: 10.5 Feet

Plot Type:

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

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 Tonight: Mostly cloudy. Lows in the lower 50s. South winds 5 to 10 mph.

Friday: Partly cloudy in the morning then becoming sunny. Highs in the mid 70s. Southeast winds around 5 mph and becoming west 5 to 15 mph in the afternoon.

Friday Night: Clear in the evening then becoming partly cloudy. Lows around 50. West winds 5 to 15 mph and becoming south around 5 mph after midnight.

Saturday: Partly cloudy in the morning then becoming sunny. Highs in the mid 70s. West winds 5 to 15 mph.

Saturday Night: Clear. Lows around 50. Northwest winds 10 to 15 mph decreasing to around 5 mph after midnight.

Sunday: Mostly cloudy in the morning then becoming sunny. Highs in the upper 70s.

Sunday Night and Monday: Mostly clear. Lows in the lower 50s. Highs in the upper 70s.

Monday Night through Tuesday Night: Partly cloudy. Lows in the lower 50s. Highs in the upper 60s.

Wednesday through Thursday: Mostly cloudy. Highs in the upper 60s. Lows around 50.

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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Verification - Historical Graphical RVF
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