Little River At Graysontown Flow Report
As of July 22, 2026, Little River At Graysontown is flowing at 178 cfs with a gage height of 1.23 ft, rising 45% over the past 24 hours. Source: USGS gauge #03170000, refreshed throughout the day.
Historical Data
Little River At Graysontown at a glance
How Little River At Graysontown is running right now, where it sits on the map, and the key gauge stats.
Little River At Graysontown is flowing at 178 cfs, with the water sitting 1.23 ft at the gage. Flow is up 45% since yesterday — a rising hydrograph.
This is USGS gauge #03170000 in Virginia. Over the past 10 days the average has been 150 cfs, peaking at 344 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Virginia flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #03170000).
Estimate flows at an ungauged site
Drainage-area ratio transfer from this gauge . Most reliable for hydrologically similar sites in the same watershed with area ratios between roughly 0.5 and 1.5.
Percentiles are flow-duration values computed from this gauge’s observed daily record as archived by Snoflo. Return periods are Weibull plotting-position estimates from observed annual maxima, provided as general reference context only. Always verify against official USGS NWIS records. Part of Snoflo for Engineering.
Streamflow Forecast
Over the next 5 days, Little River At Graysontown is expected to hold near today's 178 cfs, toward roughly 170 cfs by 2026-07-27 (likely range 106-274 cfs) -- running well below the seasonal normal.
Powered by PULSE — Snoflo’s forecast engine, trained on this gauge’s full record of storms, snowmelt, and dry spells.
| Date | Expected (p50) | Likely range (p25–p75) | vs normal | Projected stage |
|---|
How does this compare to past years?
Year-over-year overlay, annual peak discharge, the full distribution of daily flows on record, and the gauge's rating curve.
Weather Forecast
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day forecast
Daily temperatures, snow, and rain projected over the next two weeks.
Little River At Graysontown
The river is fed by several smaller tributaries and is not dammed. Seasonal trends show that flow is highest during the winter and early spring months and lowest in the late summer and early fall. The hydrology of the Little River is not particularly interesting or quirky, but it does provide important information for local water management and flood control. The primary constituents of the water are naturally occurring minerals and organic matter. Overall, the Little River at Graysontown, VA stream gauge provides essential data for understanding the behavior and health of the river system.
Nearby streamflow levels
Cross-check Little River At Graysontown's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Little River At Graysontown | 178 cfs |
| New River At Radford | 1,430 cfs |
| New River At Allisonia | 1,180 cfs |
| S F Roanoke River Near Shawsville | 59 cfs |
| Walker Creek At Bane | 63 cfs |
| Reed Creek At Grahams Forge | 81 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Little River At Graysontown. Spring snowmelt is the dominant driver of streamflow in mountain basins -- a deep snowpack upstream means more runoff later in the season.
| SNOTEL station | Snowpack |
|---|---|
| Christiansburg | 0 in |
| Blacksburg Nwso | 0 in |
| Copper Hill | 0 in |
| Galax Water Plant | 0 in |
| Greenville 1 Se | 0 in |
| Bluefield | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Little River At Graysontown.
Nearby reservoirs
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Boat launches
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River runs
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River levels & flood safety
- Read the level before you go
- A river that's runnable at one flow can be deadly at another. Check current discharge and gage height — like the values shown above — against the flood-stage thresholds, and remember levels can spike fast after rain or a dam release.
- Respect cold water
- Snowmelt rivers run cold even in summer. Sudden immersion triggers cold-water shock and saps strength within minutes. Wear a PFD, dress for the water temperature (not the air), and never wade or paddle alone.
- Watch for swiftwater hazards
- Strainers (downed trees), undercut rocks, and low-head dams are the deadliest features on moving water. High, fast, muddy water hides them. If in doubt, scout from shore and portage.
- Mind flash floods & releases
- Narrow canyons can flood from a storm miles upstream, and dam-controlled reaches can rise without warning. Know the forecast, the release schedule, and your exit before you launch.
Track Little River At Graysontown in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Little River At Graysontown crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Little River At Graysontown
Where does the streamflow data for Little River At Graysontown come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 03170000. Snoflo refreshes the time series throughout the day. Forecasts come from the NOAA / yr.no feed Snoflo's iOS app uses.
How often is the report updated?
USGS gauges report continuously (typically every 15 minutes). Snoflo pulls fresh values throughout the day — look for the "as of" timestamp on the streamflow hero card.
What's the difference between discharge and gage height?
Discharge (cubic feet per second, or cfs) is the volume of water flowing past the gauge each second. Gage height is how high the water sits at the gauge (feet). They're related by a rating curve specific to each gauge — higher water means more flow, but the exact ratio depends on channel shape.
How is "percent of median" calculated?
Today's discharge is compared to the historical median discharge on this calendar day across the gauge's full record. 100% = right on median; 200% = a very high year; 30% = a drought-level low.
What are flood stages, and is this river safe right now?
Flood stages are NWS-defined gage-height thresholds — Action, Minor, Moderate, Major — marking when nearby roads or floodplains start to be affected. "Safe" depends on your activity and skill: a level that's a fun paddle for an expert can be lethal for a wader. Always check the current level against the thresholds above and the safety links, and when in doubt, stay off the water.
Can I get alerts when Little River At Graysontown rises?
Yes — flow alerts are managed in the Snoflo iOS app. Favorite this gauge, set a streamflow threshold (e.g. "alert me when discharge crosses 5,000 cfs"), and you'll get a push the moment USGS reports the crossing.
Access the free Little River At Graysontown report
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