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



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: Jun 30, 2025 at 12:11 PM PDT
Action/Monitor: 9.0 FeetMinor Flood: 10.5 FeetModerate Flood: 11.5 FeetMajor Flood: 15.0 Feet
Please Note:Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty.
Threshold Exceedance Plot                  Product Information        CSV Ensemble Files (Data in kcfs):  Forecast Group  |  GUDC1

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What information is considered in this forecast?
Verification / Historical Plots
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Location Photographs

ESRI™ Locator Map
Flood Impacts
17.01 FeetCont'...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 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. CA87/I-280 interchange at risk from overland flow spilling onto the roadway.
15.0 FeetMajor 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 FeetHistorical High Water - January 1995
11.5 FeetModerate 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 FeetMinor 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 FeetMonitor 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)
Today: Sunny. Highs in the 80s to lower 90s. South winds around 5 mph and becoming northwest 5 to 15 mph in the afternoon.

Tonight: Mostly clear. Lows in the upper 50s. West winds 5 to 10 mph and becoming south after midnight.

Wednesday: Partly cloudy in the morning then becoming sunny. Highs in the 80s. Light winds and becoming southwest 5 to 10 mph in the afternoon.

Wednesday Night: Mostly clear. Lows in the upper 50s. Southwest winds 5 to 15 mph.

Thursday: Partly cloudy in the morning then becoming sunny. Highs in the upper 70s to mid 80s. West winds 5 to 10 mph.

Thursday Night: Mostly clear in the evening then becoming partly cloudy. Lows in the mid 50s.

Independence Day through Monday: Mostly clear. Highs in the 70s to mid 80s. Lows in the mid 50s.