Genesee River At Avon Flow Report
As of July 21, 2026, Genesee River At Avon is flowing at 397 cfs with a gage height of 14.07 ft, receding 7% over the past 24 hours. Source: USGS gauge #04228500, refreshed throughout the day.
Historical Data
Genesee River At Avon at a glance
How Genesee River At Avon is running right now, where it sits on the map, and the key gauge stats.
Genesee River At Avon is flowing at 397 cfs, with the water sitting 14.07 ft at the gage. Flow is down 7% since yesterday as the gauge recedes.
This is USGS gauge #04228500 in New York. Over the past 10 days the average has been 558 cfs, peaking at 1,090 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the New York flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #04228500).
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, Genesee River At Avon Ny is expected to recede from today's 397 cfs, toward roughly 350 cfs by 2026-07-25 (likely range 116-1057 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.
Genesee River At Avon
The river is primarily fed by snowmelt and rain, with occasional contributions from smaller tributaries. The river flows through several dams, including the Mount Morris Dam, which is one of the largest in the country. Seasonally, the flow of water varies depending on the weather, with the highest flows typically occurring in the spring. The Genesee River is known for its scenic beauty and recreational opportunities, including fishing and kayaking. Additionally, the river has played an important role in the history of Western New York, as it was once a major transportation route for goods and people.
Nearby streamflow levels
Cross-check Genesee River At Avon's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Genesee River At Avon Ny | 397 cfs |
| Conesus Creek Near Lakeville | 11 cfs |
| Oatka Creek At Garbutt Ny | 88 cfs |
| Honeoye Creek At Honeoye Falls Ny | 16 cfs |
| Genesee River Near Mount Morris Ny | 357 cfs |
| Black Creek At Churchville Ny | 746 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Genesee River At Avon. 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 |
|---|---|
| Avon | 0 in |
| Scottsville 0.4 Nw | 0 in |
| Stafford 1.8 Ne | 0 in |
| Rochester 5.7 W | 0 in |
| Wyoming 3w | 0 in |
| Wyoming Coop | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Genesee River At Avon.
Boat launches
See all →
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 Genesee River At Avon in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Genesee River At Avon crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Genesee River At Avon
Where does the streamflow data for Genesee River At Avon come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 04228500. 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 Genesee River At Avon 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 Genesee River At Avon report
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