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USGS Gauge 01645762 — S F Little Difficult Run above Mouth Nr Vienna, Virginia
1 cfs.
Open in BirdTrout Get it on the App Store38.90888916, -77.3382627. This gauge on USGS Water Data →
Right now
- 66.2 °F Water temperature
- 1 Cubic ft / second
Live from USGS — the numbers above are current rather than whenever the page was written.
Daily means from USGS. A gap in the line is a gap in the record.
The record at this gauge
| Month | Mean temp | Mean flow |
|---|---|---|
| Jan | — | 2 |
| Feb | — | 2 |
| Mar | — | 2 |
| Apr | — | 2 |
| May | — | 2 |
| Jun | — | 2 |
| Jul | — | 2 |
| Aug | — | 1 |
| Sep | — | 1 |
| Oct | — | 1 |
| Nov | — | 1 |
| Dec | — | 2 |
- 51Highest flow, 2022-08-10
- 0Lowest flow, 2024-09-16
Computed here from the last 5 years of USGS daily values at this gauge — 0 temperature days and 1,825 flow days. These are not USGS-published normals, and a month with fewer than 20 days of record is left blank rather than averaged.
What this gauge predicts
This is one of the gauges this site fits an air-to-water model against, which is how the map colours water that has no gauge on it. July mean 74.02 °F; the fit explains 90% of the variance with a typical error of 1.733 °F.
The water it stands in
South Fork Little Difficult Run, classified Class VI (stocked holdover) by VDWR.
Snapped to NHD reach South Fork Little Difficult Run (10000500086385), 2.4 m away. That join is what lets the app paint this gauge's reading onto the reach it measures.
Other gauges near this one
- The Glade near Howland Drive at Reston, VA 1.2 mi · USGS 0164579522
- Snakeden Branch above Lake Audubon at Reston, VA 1.4 mi · USGS 0164578734
- Difficult Run above Fox Lake near Fairfax, VA 1.7 mi · USGS 01645704
Fly shops nearby
- District Angling12.5 mi · Arlington
- Orvis15.8 mi