CNRFC - Hydrology - River Guidance - Graphical RVF

*** 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.

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Location:

SACRAMENTO RIVER DELTA - MALLARD ISLAND (MLIC1)

Latitude: 38.04º N	Longitude: 121.92º W	Elevation: 0 Feet
Location: Contra Costa County in California		Bulletin Group: Lower Sacramento		River Group: Lower Sacramento

Issuance Time:

Jun 16 2025 at 6:13 AM PDT

Next Issuance:

Jun 17 2025 at 9:00 AM PDT

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 California Department of Water Resources. View California Department of Water Resources Data for this station location.

Delta Tide Forecast - Text Bulletin (RNORVFSAC)
Rio Vista, Antioch, Mallard Island, and Venice Island

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ018)

Today: Sunny. Not as warm. Highs 76 to 82. Southwest winds 10 to 20 mph with gusts to around 30 mph.

Tonight: Clear, breezy. Lows around 52. Southwest winds 15 to 25 mph decreasing to 10 to 15 mph after midnight. Gusts up to 35 mph.

Friday: Sunny. Highs 72 to 78. Southwest winds 10 to 15 mph with gusts to around 30 mph.

Friday Night: Clear, breezy. Lows around 52. West winds 10 to 25 mph with gusts to around 35 mph.

Saturday: Sunny, breezy. Highs 76 to 82. Northwest winds 15 to 25 mph.

Saturday Night: Clear. Lows 54 to 60.

Sunday: Sunny. Highs 80 to 86.

Sunday Night through Wednesday: Clear. Lows around 55. Highs 83 to 89.

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 Sacramento 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
Month:	Day:	Year:	Cycle:
To view other verification locations, use our Historical Graphical River Forecast Interface.