National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

 |  End of River Group

GUADALUPE RIVER - SAN JOSE AT ALMADEN EXPRESSWAY (GUDC1)
Latitude: 37.28º NLongitude: 121.88º WElevation: 150 Feet
Location: Santa Clara County in CaliforniaBulletin Group: Central CoastRiver Group: South Bay
Issuance Time: Apr 13 2024 at 8:45 AM PDTNext Issuance: Apr 14 2024 at 9:00 AM PDT
Monitor Stage: 9.0 FeetFlood Stage: 10.5 Feet

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
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Raw streamflow data is provided by the Santa Clara Valley Water District.
View SCVWD Data for this station location.

Verification - Historical Graphical RVF
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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
ESRI™ Locator Map
Impacts - E19 Information
9.0 FeetAdditional flow from Canoas Creek watershed or increased reservoir spills may bring river to flood stage.
10.5 FeetRiver 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 FeetRiver 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 FeetHistorical high water mark, January 1995.
15.0 FeetFlooding 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 FeetWashington/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)
Tonight: A slight chance of thunderstorms in the evening. Showers. Lows in the mid 40s. Southeast winds 10 to 20 mph.

Sunday: Mostly cloudy. A chance of showers in the morning, then a slight chance of showers in the afternoon. Highs in the lower 60s. East winds around 5 mph and becoming northwest 5 to 15 mph in the afternoon.

Sunday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 40s. Northwest winds 10 to 15 mph decreasing to around 5 mph after midnight.

Monday: Partly cloudy. Highs in the upper 60s. Northwest winds 5 to 10 mph.

Monday Night: Mostly clear. Lows in the upper 40s. Northwest winds 5 to 15 mph.

Tuesday: Partly cloudy in the morning then becoming sunny. Highs in the upper 70s.

Tuesday Night and Wednesday: Mostly clear. Lows in the lower 50s. Highs in the lower 80s.

Wednesday Night through Thursday Night: Partly cloudy. Lows in the mid 50s. Highs in the lower 80s.

Friday through Saturday: Mostly clear. Highs in the upper 70s. Lows in the lower 50s.
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.