USGS Streamgage 06635000
Medicine Bow River Ab Seminoe Reservoir, near Hanna, WY
Medicine Bow River Ab Seminoe Reservoir, near Hanna, WY is USGS streamgage 06635000 in Wyoming, monitoring river discharge in hydrologic subbasin 10180004. It sits on the Medicine Bow River, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 2,338 square miles. Discharge records at this site go back to 1939. Typical flow runs near 80.3 cfs in July and 236.5 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.
View live conditions & forecast →
Gauge details
- State
- Wyoming
- Drainage area
- 2,338 sq mi
- Gauge elevation
- 6,429 ft
- Subbasin (HUC-8)
- 10180004
- Coordinates
- 42.00967, -106.51314
- USGS site number
- 06635000
- Records begin
- 1939-07-01 (87 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Medicine Bow River Ab Seminoe Reservoir, near Hanna, 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 |
|---|---|---|---|---|
| 0.6 | 1.1 | 1.8 | ||
| 0.4 | 1 | 2.4 | ||
| 0.3 | 0.9 | 3.1 | ||
| 0.2 | 0.9 | 3.3 | ||
| 0.2 | 1 | 3.8 | ||
| 0.2 | 1.1 | 4.4 | ||
| 0.4 | 1.6 | 6.3 | ||
| 0.5 | 2.3 | 9.3 | ||
| 0.4 | 2.5 | 9.3 | ||
| 0.5 | 2.5 | 9.5 | ||
| 0.4 | 2.5 | 9.9 | ||
| 0.3 | 2.2 | 9.5 | ||
| 0.2 | 1.8 | 8.4 | ||
| 0.2 | 1.8 | 8.6 |
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 87 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 | 15.2 | 29.3 | 55.9 | |
| February | 16.3 | 37.5 | 73.7 | |
| March | 41.5 | 104 | 242 | |
| April | 104.9 | 236.5 | 585.2 | |
| May | 113.3 | 449.2 | 985.2 | |
| June | 95.3 | 525.8 | 1,379.5 | |
| July | 11.2 | 80.3 | 422.6 | |
| August | 4.9 | 27.1 | 117.2 | |
| September | 5.7 | 16.1 | 49.9 | |
| October | 13.6 | 31.1 | 80.7 | |
| November | 20.7 | 42.1 | 84.7 | |
| December | 17 | 31.7 | 63.9 |
All values in cubic feet per second (cfs).
Common questions
- When does Medicine Bow River Ab Seminoe Reservoir, near Hanna, WY normally run highest?
- June, on the long-term record. The median daily flow that month is about 525.8 cfs, against 16.1 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Medicine Bow River Ab Seminoe Reservoir, near Hanna, WY?
- It depends on the month. In January, half of days historically fall near 29.3 cfs, with the middle 80% of days between 15.2 and 55.9 cfs. The month-by-month table on this page gives the full range.
- How long has Medicine Bow River Ab Seminoe Reservoir, near Hanna, WY been measured?
- Discharge records at USGS site 06635000 begin in 1939, about 87 years, covering roughly 9,200 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Medicine Bow River Ab Seminoe Reservoir, near Hanna, 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 Medicine Bow River Ab Seminoe Reservoir, near Hanna, WY?
- The gauge sits at 42.00967, -106.51314, in Wyoming, in hydrologic subbasin 10180004, at an elevation of about 6,429 feet, draining roughly 2,338 square miles.
- Can I use Medicine Bow River Ab Seminoe Reservoir, near Hanna, 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.
Upstream and downstream on the Medicine Bow River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Medicine Bow River in full.
- Medicine Bow River ab E Fk Med Bow near Elk Mountain, WY 46 sq mi
- Medicine Bow River Ab Seminoe Reservoir, near Hanna, WY this page