CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

ALAMEDA CREEK - ABOVE DIVERSION DAM (MPTC1)

Latitude: 37.50º N	Longitude: 121.77º W	Elevation: 930 Feet
Location: Alameda County in California		Bulletin Group: Central Coast		River Group: South Bay

Issuance Time:

Dec 24 2025 at 2:11 PM PST

Next Issuance:

Dec 25 2025 at 9:00 AM PST

Action/Monitor: N/A

Minor Flood: 6.0 Feet

Moderate Flood: 8.5 Feet

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

Official 7 Day National Weather Service Forecast (CAZ515)

Tonight: Breezy. Showers and a slight chance of thunderstorms. Some thunderstorms may be severe with heavy rainfall in the evening. Some thunderstorms may produce heavy rainfall after midnight. Lows around 50. South winds 20 to 30 mph with gusts to around 55 mph.

Christmas Day: Breezy. Showers and a slight chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Highs in the lower 50s. Southwest winds 20 to 30 mph. Gusts up to 50 mph in the morning.

Thursday Night: Breezy. A slight chance of thunderstorms in the evening. Showers. Some thunderstorms may produce heavy rainfall in the evening. Lows in the upper 40s. South winds 20 to 30 mph with gusts to around 45 mph.

Friday: Showers. Highs in the lower 50s. South winds around 20 mph decreasing to around 10 mph in the afternoon.

Friday Night: Mostly cloudy. A chance of showers. Lows in the lower 40s. South winds 5 to 10 mph. Chance of showers 50 percent.

Saturday: Mostly cloudy. A slight chance of showers. Highs in the upper 40s.

Saturday Night: Mostly clear. Lows in the upper 30s.

Sunday: Partly cloudy in the morning then becoming sunny. Highs in the upper 40s.

Sunday Night and Monday: Mostly clear. Areas of frost. Lows in the mid 30s. Highs in the upper 40s.

Monday Night: Mostly clear in the evening then becoming partly cloudy. Lows in the mid 30s.

Tuesday: Mostly cloudy in the morning then becoming partly cloudy. Highs in the lower 50s.

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

Wednesday: Mostly cloudy in the morning then becoming partly cloudy. Highs around 50.

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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Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.