North Anna River river
Total streamflow across the North Anna River was last observed at 113 cfs, and is expected to yield approximately 223 acre-ft of water today; about 17% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 661 cfs, with recent peaks last observed on 2018-06-24 when daily discharge volume was observed at 17,320 cfs.
Maximum discharge along the river is currently at the North Anna River At Hart Corner Near Doswell reporting a streamflow rate of 67.5 cfs. However, the streamgauge with the highest stage along the river is the North Anna River Near Partlow with a gauge stage of 3.83 ft. This river is monitored from 2 different streamgauging stations along the North Anna River, the highest being situated at an altitude of 194 ft, the North Anna River Near Partlow.
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the North Anna River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the North Anna River
All 2 USGS gauges Snoflo tracks for this river, with current flow, stage, recent change, percent of normal, and the gauge's all-time min / max. Click any header to sort. Cells are heatmapped relative to the column min/max -- darker blue = higher.
| Streamgauge▾ | Streamflow (cfs)▾ | Gauge stage (ft)▾ | 24h Δ (%)▾ | % Normal▾ | Min (cfs)▾ | Max (cfs)▾ | Elevation (ft)▾ |
|---|---|---|---|---|---|---|---|
|
North Anna River Near Partlow
VA
USGS 01670400
|
45 | 3.83 | -3.0 | 32% | 6 | 10,000 | 194 |
|
North Anna River At Hart Corner Near Doswell
VA
USGS 01671020
|
68 | 3.28 | -14.0 | 24% | 22 | 12,500 | 64 |
Maximum streamflow discharge by year
The single highest aggregate discharge recorded each year. Spotting the multi-year trend reveals droughts vs. wet cycles long before the headline daily flow does.
Annual peak discharge
From the river's full record · one point per water year
Streamflow elevation profile
Each bubble is one gauge along the river, plotted by current streamflow (x-axis) vs elevation (y-axis), sized by gauge stage. Reading top-to-bottom traces the river from headwaters down to its mouth -- you can see flow accumulate as elevation drops.
Elevation vs streamflow
One point per monitored gauge · bubble size = gauge stage
North Anna River
The North Anna River is a 42-mile long river located in central Virginia. It has a rich history dating back to the colonial era when it was a vital transportation route for goods and people. The river has a varied hydrology and is fed by numerous streams and springs, making it an important source of drinking water for several communities. The North Anna River is also home to two major reservoirs, Lake Anna and South Anna Reservoir, both of which are primarily used for hydroelectric power generation and irrigation. The river's diverse ecosystem supports a variety of recreational activities such as fishing, boating, and hiking. Additionally, the river plays an important role in the region's agriculture, providing irrigation for crops and livestock.
Track the North Anna River in the Snoflo app
Set per-gauge push alerts (e.g. "alert me when flow at the Russian R Nr Healdsburg crosses 5,000 cfs"), and Snoflo's iOS app pushes the moment USGS reports the crossing.
About the North Anna River
Where does the data for the North Anna River come from?
Streamflow and gauge stage data are sourced from the U.S. Geological Survey (USGS) National Water Information System. The aggregate flow shown at the top of the page is computed by Snoflo as the sum of all monitored gauges along the river.
How is "percent of normal" calculated?
Today's aggregate streamflow is compared to the historical average aggregate streamflow on this calendar day across the river's full record. 100% means right on average; values above 100% indicate above-normal flow (wet year); values below indicate below-normal (dry year or drought).
Why are some gauges showing very different flows?
Gauges along a river measure flow at different points: headwater gauges read what's coming off the snowpack or mountain runoff; downstream gauges integrate everything upstream, including tributary inputs. Wide spreads usually mean a tributary is contributing significantly between gauges.
What's the elevation profile chart showing?
Each bubble is one gauge along the river, plotted by streamflow (x-axis) and elevation (y-axis), sized by gauge stage. Reading top-down traces the river from headwaters to mouth -- you can see flow build as elevation drops.
Can I get alerts when a specific gauge crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app on a per-gauge basis. Open any individual streamgauge from the table above and favorite it to set a discharge threshold.