CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

ALAMO CANAL - PLEASANTON (ALQC1)

Latitude: 37.69º N	Longitude: 121.92º W	Elevation: 330 Feet
Location: Alameda 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: N/A

Minor Flood: N/A

Moderate Flood: N/A

Major Flood: N/A

Plot Type:

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.

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View US Geological Survey (USGS) Data for this station location.

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
21.59 Feet	Minor Flood Stage - Flooding is expected. Stage may begin to overtop the top of bank elevation along channel. Downstream of the channel may begin to overtop into centennial trail and into Johnson Drive.
20.59 Feet	Monitor Stage - Stage (height of water in channel) is at or has exceeded the minimum freeboard elevation and may soon overtop its banks.

Official 7 Day National Weather Service Forecast (CAZ510)

Tonight: Showers in the evening. A slight chance of thunderstorms. A chance of showers after midnight. Some thunderstorms may be severe with heavy rainfall. Lows in the upper 40s. South winds 10 to 20 mph with gusts to around 35 mph.

Friday: Mostly cloudy. A chance of showers. Highs in the mid 50s. South winds 10 to 20 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. Southwest 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 lower 50s. Northwest winds 5 to 10 mph. Chance of showers 20 percent.

Saturday Night: Mostly clear in the evening then becoming partly cloudy. Areas of frost after midnight. Lows in the upper 30s. North winds around 5 mph.

Sunday: Partly cloudy. Highs around 50.

Sunday Night: Mostly clear. Areas of frost. Lows in the mid 30s.

Monday: Sunny. Highs in the lower 50s.

Monday Night: Clear except for frost. Lows in the mid 30s.

Tuesday: Mostly cloudy in the morning then becoming sunny. Highs in the lower to mid 50s.

Tuesday Night: Mostly clear in the evening then becoming partly cloudy. Patchy fog. Lows in the upper 30s.

Wednesday: Mostly cloudy in the morning then becoming partly cloudy. Highs in the lower to mid 50s.

Wednesday Night: Partly cloudy in the evening then becoming mostly cloudy. Patchy fog. A slight chance of showers. Lows around 40.

New Years Day: Mostly cloudy. A chance of showers. Highs in the lower to 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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