*** IMPORTANT *** Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.
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:
Jun 16 2025 at 6:35 AM PDT
Next Issuance:
Jun 17 2025 at 9:00 AM PDT
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)
rest of Tonight: Mostly clear late in the evening then becoming partly cloudy. Lows in the lower 50s. Northwest winds 10 to 20 mph.
Friday: Partly cloudy in the morning then becoming sunny. Highs in the upper 60s to mid 70s. Northwest winds 5 to 10 mph increasing to 15 to 20 mph in the afternoon.
Friday Night: Mostly clear. Lows around 50. Northwest winds 15 to 20 mph with gusts to around 35 mph.
Saturday: Sunny. Highs in the 70s. Northwest winds 10 to 20 mph.
Saturday Night: Clear. Lows in the lower 50s. Northwest winds 10 to 20 mph and becoming 5 to 10 mph after midnight.
Sunday: Sunny. Highs in the mid 70s to lower 80s.
Sunday Night and Monday: Mostly clear. Lows in the lower 50s. Highs near 80.
Monday Night: Mostly clear in the evening then becoming partly cloudy. Lows in the mid 50s.
Tuesday through Thursday: Mostly clear. Highs in the mid 70s to upper 80s. Lows in the mid 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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