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: Mar 28 2024 at 2:12 PM PDTNext Issuance: Mar 29 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)
Today: Breezy. A chance of showers in the morning, then showers and a slight chance of thunderstorms in the afternoon. Highs in the mid to upper 50s. Southeast winds 10 to 20 mph increasing to 20 to 30 mph in the afternoon.

Tonight: Breezy. Showers likely and a slight chance of thunderstorms. Lows in the upper 40s. Southeast winds 20 to 30 mph decreasing to 10 to 20 mph after midnight.

Saturday: Showers and a slight chance of thunderstorms. Highs in the lower 60s. Southeast winds 15 to 20 mph.

Saturday Night: Mostly cloudy in the evening then becoming partly cloudy. A chance of showers and a slight chance of thunderstorms in the evening. Lows in the mid 40s. Northeast winds 5 to 15 mph. Chance of precipitation 30 percent.

Sunday: Partly cloudy in the morning then becoming mostly cloudy. Highs in the mid 60s. Light winds and becoming west 5 to 10 mph in the afternoon.

Sunday Night: Mostly cloudy in the evening then becoming mostly clear. Lows in the mid 40s.

Monday: Sunny. Highs in the lower 70s.

Monday Night and Tuesday: Clear. Lows in the upper 40s. Highs in the mid 70s.

Tuesday Night and Wednesday: Mostly clear. Lows around 50. Highs in the mid 70s.

Wednesday Night and Thursday: Partly cloudy. Lows in the upper 40s. Highs in the mid 60s.
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.