Napa River

Streamflow Hydrology Weather


Napa River Levels

May 1 2024

185 ACRE-FT

Discharge Volume Today
-4.1 cfs (-4.21%) since yesterday
84.03% of Normal 2 Streamgauges

Total streamflow across the Napa River was last observed at 93 cfs, and is expected to yield approximately 185 acre-ft of water today; about 84% of normal. Average streamflow for this time of year is 111 cfs, with recent peaks last observed on 2024-02-05 when daily discharge volume was observed at 12,030 cfs.

Maximum discharge along the river is currently at the Napa R Nr Napa Ca reporting a streamflow rate of 67.2 cfs. This is also the highest stage along the Napa River, with a gauge stage of 3.57 ft at this location. This river is monitored from 2 different streamgauging stations along the Napa River, the highest being situated at an altitude of 179 ft, the Napa R Nr St Helena Ca.

Last Updated 2024-05-01
Streamflow 93.4 cfs
Percent of Normal 84.03%
Maximum 12,030.0 cfs
2024-02-05

About the napa river


The Napa River is a 55-mile-long river in northern California that flows through the Napa Valley. It has a long history of flooding, and has been managed through various flood control projects. There are several reservoirs and dams along the river, including the Lake Berryessa Dam and the Monticello Dam, which form Lake Berryessa and Lake Hennessey, respectively. These reservoirs provide water for agricultural uses in the valley. The river is also a popular recreational destination for activities such as fishing, kayaking, and hiking. The river's hydrology has been impacted by human activity, including land use changes and water diversions. Restoration efforts are underway to improve the health of the river and its ecosystem.

Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Napa R Nr St Helena Ca
USGS 11456000
26 cfs 1.55 ft -7.42
Napa R Nr Napa Ca
USGS 11458000
67 cfs 3.57 ft -2.89

Peak Annual Discharge

Napa River Maximum Total Discharge

Seasonal Comparison

Napa River Year Over Year Discharge


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