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:
Nov 12 2025 at 1:22 PM PST
Next Issuance:
Nov 13 2025 at 9:00 AM PST
Action/Monitor: 9.0 Feet
Minor Flood: 10.5 Feet
Moderate Flood: 11.5 Feet
Major Flood: 15.0 Feet
Please Note: 1) 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.
2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.
Cont'...Possible overtopping of Guadalupe River near Capitol Expwy on the east side, flowing towards Pearl Ave. 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 incresing, car dealerships along Capitol Expwy may be inundated as well. 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. CA87/I-280 interchange at risk from overland flow spilling onto the roadway.
15.0 Feet
Major Flood Stage. Flooding continues to spill near Alam Avenue, flowing northward and crossing east under Willow Street and Alma Avenue viaducts, continuing to flow north. Overbanking occurs at Atlanta Avenue just upstream of CA87. 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.
11.73 Feet
Historical High Water - January 1995
11.5 Feet
Moderate Flood Stage. River continues to overtop upstream of Alma Avenue Bridge into the Elks Lodge, spilling north along Lelong Street. Alma Avenue/CA87 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 also at risk.
10.5 Feet
Minor Flood Stage. River begins to overtop upstream of Alma Avenue Bridge into the Elks Lodge, spilling north, as well as near the RxR on the east bank.
9.0 Feet
Monitor Stage. Additional flow from Canoas Creek watershed or increased reservoir spills may bring river to flood stage.
Official 7 Day National Weather Service Forecast (CAZ513)
Tonight: A slight chance of rain in the evening, then rain after midnight. Lows around 60. Southeast winds 10 to 20 mph with gusts to around 35 mph.
Thursday: Showers and a slight chance of thunderstorms in the morning, then rain in the afternoon. Highs in the mid 60s. Southeast winds 10 to 20 mph with gusts to around 40 mph.
Thursday Night: Showers likely in the evening, then a chance of showers after midnight. Lows in the lower 50s. Southeast winds 5 to 15 mph. Gusts up to 35 mph in the evening.
Friday: Mostly cloudy. A chance of showers. Highs in the mid 60s. East winds around 5 mph and becoming northwest in the afternoon. Chance of showers 40 percent.
Friday Night: Partly cloudy. A slight chance of showers. Lows around 50. North winds around 5 mph. Chance of showers 20 percent.
Saturday: Mostly cloudy. A chance of showers. Highs in the mid 60s.
Saturday Night through Monday: Mostly cloudy. A chance of showers. Lows around 50. Highs in the lower 60s.
Monday Night: Partly cloudy. A slight chance of showers. Lows in the mid 40s.
Tuesday and Tuesday Night: Partly cloudy. Highs in the lower 60s. Lows in the lower 40s.
Wednesday: Partly cloudy. A chance of showers. Highs in the lower 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.
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