USGS Streamgage 09217000
Green River near Green River, WY
Green River near Green River, WY is USGS streamgage 09217000 in Wyoming, monitoring river discharge in hydrologic subbasin 14040106. It drains a watershed of about 14,000 square miles. Discharge records at this site go back to 1918. Typical flow runs near 1,998.1 cfs in July and 1,310.7 cfs in April, with the higher of the two arriving in July. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead, alongside daily high and low water-temperature forecasts.
View live conditions & forecast →
Gauge details
- State
- Wyoming
- Drainage area
- 14,000 sq mi
- Gauge elevation
- 6,069 ft
- Subbasin (HUC-8)
- 14040106
- Coordinates
- 41.51632, -109.44906
- USGS site number
- 09217000
- Records begin
- 1918-06-19 (108 years)
- Rivermatics forecast
- 14-day flow outlook + water temperature
14-day flow forecast
Based on observations through for Green River near Green River, 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 |
|---|---|---|---|---|
| 570 | 580 | 590 | ||
| 562 | 579 | 598 | ||
| 554 | 576 | 604 | ||
| 547 | 575 | 615 | ||
| 539 | 574 | 620 | ||
| 535 | 575 | 625 | ||
| 543 | 586 | 648 | ||
| 538 | 589 | 656 | ||
| 535 | 589 | 663 | ||
| 530 | 587 | 664 | ||
| 523 | 583 | 662 | ||
| 516 | 580 | 662 | ||
| 508 | 575 | 654 | ||
| 502 | 572 | 652 |
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 | 342.9 | 800 | 1,294.5 | |
| February | 375.8 | 849.5 | 1,344.8 | |
| March | 541.5 | 966.5 | 1,626.1 | |
| April | 716.5 | 1,310.7 | 2,690.3 | |
| May | 730.2 | 1,825.8 | 4,729 | |
| June | 751 | 3,888.7 | 8,838.7 | |
| July | 670.4 | 1,998.1 | 6,394.5 | |
| August | 567.3 | 1,324.5 | 2,360.6 | |
| September | 522.7 | 954 | 1,520.3 | |
| October | 520.5 | 902.1 | 1,386.5 | |
| November | 464.4 | 869.1 | 1,241.7 | |
| December | 381.8 | 790.7 | 1,208.1 |
All values in cubic feet per second (cfs).
Common questions
- When does Green River near Green River, WY normally run highest?
- June, on the long-term record. The median daily flow that month is about 3,888.7 cfs, against 790.7 cfs in December, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Green River near Green River, WY?
- It depends on the month. In January, half of days historically fall near 800 cfs, with the middle 80% of days between 342.9 and 1,294.5 cfs. The month-by-month table on this page gives the full range.
- How long has Green River near Green River, WY been measured?
- Discharge records at USGS site 09217000 begin in 1918, about 108 years, covering roughly 9,199 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Green River near Green River, 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. A companion model forecasts each day's water-temperature high and low. 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 Green River near Green River, WY?
- The gauge sits at 41.51632, -109.44906, in Wyoming, in hydrologic subbasin 14040106, at an elevation of about 6,069 feet, draining roughly 14,000 square miles.
- Can I use Green River near Green River, 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.