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:
Dec 25 2025 at 2:02 PM PST
Next Issuance:
Dec 26 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.
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
11.0 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
Action 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: Showers in the evening. A slight chance of thunderstorms. Showers likely after midnight. Some thunderstorms may be severe with heavy rainfall. Lows in the upper 40s. South winds 10 to 20 mph. Gusts up to 40 mph in the evening.
Friday: A chance of showers in the morning, then showers likely in the afternoon. Highs in the mid 50s. Southeast winds 5 to 15 mph.
Friday Night: Mostly cloudy. A slight chance of thunderstorms in the evening. A chance of showers. Some thunderstorms may produce heavy rainfall in the evening. Lows in the mid 40s. Southeast winds 5 to 10 mph.
Saturday: Mostly cloudy in the morning then becoming partly cloudy. A slight chance of showers in the morning. Highs in the mid 50s. Northwest winds 5 to 10 mph. Chance of showers 20 percent.
Saturday Night: Clear except for frost after midnight. Lows in the upper 30s. North winds around 5 mph.
Sunday: Partly cloudy in the morning then becoming sunny. Highs in the mid 50s.
Sunday Night through Wednesday: Mostly clear. Lows in the upper 30s. Highs in the lower 60s.
Wednesday Night: Partly cloudy. A slight chance of showers. Lows in the lower 40s.
New Years Day: Partly cloudy in the morning then becoming mostly cloudy. A chance of showers. Highs in the upper 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.
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