Johns River river
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Johns River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Johns River
All 1 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)▾ |
|---|---|---|---|---|---|---|---|
|
Johns River At Arneys Store
NC
USGS 02140991
|
68 | 1.89 | -5.7 | 7% | 59 | 39,000 | 1,018 |
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
Johns River
The Johns River is a major river in western North Carolina, stretching about 214 miles from its source in the Blue Ridge Mountains to its confluence with the Catawba River. The river is named after explorer John Barnwell, who discovered it in the early 1700s. The Johns River flows through several reservoirs, including Lake James, Lake Rhodhiss, and Lake Hickory, which were created by hydroelectric dams to generate power for the surrounding communities. These reservoirs provide drinking water, recreation, and economic benefits to the region. The river also plays a vital role in agriculture, providing irrigation water for farms and supporting the growth of crops such as corn, soybeans, and tobacco. Despite some environmental concerns, the Johns River remains an important resource for the people of western North Carolina.
Recreation along the Johns River
Fishing access and paddle runs Snoflo tracks within the watershed.
Track the Johns 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 Johns River
Where does the data for the Johns 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.