USGS Streamgage 09210500
Fontenelle C near Herschler Ranch, near Fontenelle, WY
Fontenelle C near Herschler Ranch, near Fontenelle, WY is USGS streamgage 09210500 in Wyoming, monitoring river discharge in hydrologic subbasin 14040101. It drains a watershed of about 154 square miles. Discharge records at this site go back to 1951. Typical flow runs near 61.8 cfs in July and 77.6 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
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Gauge details
- State
- Wyoming
- Drainage area
- 154 sq mi
- Gauge elevation
- 6,963 ft
- Subbasin (HUC-8)
- 14040101
- Coordinates
- 42.09581, -110.41608
- USGS site number
- 09210500
- Records begin
- 1951-10-01 (75 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Fontenelle C near Herschler Ranch, near Fontenelle, WY. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 19.3 | 20.6 | 22 | ||
| 18.6 | 20.3 | 22 | ||
| 17.9 | 19.7 | 21.7 | ||
| 17.5 | 19.5 | 21.6 | ||
| 17.3 | 19.4 | 21.7 | ||
| 16.9 | 19.2 | 21.7 | ||
| 17.5 | 20.1 | 23.6 | ||
| 17.9 | 20.8 | 24.7 | ||
| 17.3 | 20.3 | 23.8 | ||
| 16.8 | 19.8 | 23.2 | ||
| 16.5 | 19.4 | 22.7 | ||
| 16.1 | 19.1 | 22.5 | ||
| 15.9 | 18.8 | 22.2 | ||
| 15.6 | 18.6 | 22 |
All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 74 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 16.6 | 25.1 | 34.2 | |
| February | 17.7 | 26 | 35 | |
| March | 20.4 | 30.2 | 56 | |
| April | 37.4 | 77.6 | 195.7 | |
| May | 82.9 | 177.7 | 399.5 | |
| June | 64.5 | 181.6 | 443.7 | |
| July | 27.2 | 61.8 | 147.2 | |
| August | 17.7 | 33.4 | 63.4 | |
| September | 17.3 | 27.1 | 49.2 | |
| October | 21.7 | 30.4 | 46 | |
| November | 20.3 | 28.3 | 41.3 | |
| December | 17.2 | 25.2 | 38 |
All values in cubic feet per second (cfs).
Common questions
- When does Fontenelle C near Herschler Ranch, near Fontenelle, WY normally run highest?
- June, on the long-term record. The median daily flow that month is about 181.6 cfs, against 25.1 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Fontenelle C near Herschler Ranch, near Fontenelle, WY?
- It depends on the month. In January, half of days historically fall near 25.1 cfs, with the middle 80% of days between 16.6 and 34.2 cfs. The month-by-month table on this page gives the full range.
- How long has Fontenelle C near Herschler Ranch, near Fontenelle, WY been measured?
- Discharge records at USGS site 09210500 begin in 1951, about 75 years, covering roughly 9,186 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Fontenelle C near Herschler Ranch, near Fontenelle, WY?
- Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
- Where is Fontenelle C near Herschler Ranch, near Fontenelle, WY?
- The gauge sits at 42.09581, -110.41608, in Wyoming, in hydrologic subbasin 14040101, at an elevation of about 6,963 feet, draining roughly 154 square miles.
- Can I use Fontenelle C near Herschler Ranch, near Fontenelle, WY data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.