USGS Streamgage 13027500
Salt River above Reservoir, near Etna, WY
Salt River above Reservoir, near Etna, WY is USGS streamgage 13027500 in Wyoming, monitoring river discharge in hydrologic subbasin 17040105. It drains a watershed of about 856 square miles. Discharge records at this site go back to 1918. Typical flow runs near 695 cfs in July and 877.5 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
- 856 sq mi
- Subbasin (HUC-8)
- 17040105
- Coordinates
- 43.07972, -111.03722
- USGS site number
- 13027500
- Records begin
- 1918-06-17 (108 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Salt River above Reservoir, near Etna, 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 |
|---|---|---|---|---|
| 374 | 385 | 401 | ||
| 367 | 384 | 410 | ||
| 362 | 382 | 413 | ||
| 357 | 380 | 412 | ||
| 354 | 378 | 413 | ||
| 351 | 377 | 415 | ||
| 348 | 376 | 415 | ||
| 346 | 376 | 417 | ||
| 344 | 375 | 418 | ||
| 343 | 374 | 419 | ||
| 341 | 374 | 422 | ||
| 340 | 374 | 425 | ||
| 339 | 373 | 425 | ||
| 337 | 372 | 425 |
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 73 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 | 336.5 | 439.1 | 548.5 | |
| February | 336.2 | 420.8 | 519.9 | |
| March | 359.3 | 449.4 | 628.7 | |
| April | 537 | 877.5 | 1,561.2 | |
| May | 675.7 | 1,581.9 | 2,972.9 | |
| June | 511.3 | 1,323.6 | 2,763 | |
| July | 383.7 | 695 | 1,430.6 | |
| August | 361.7 | 559.8 | 872.1 | |
| September | 391.9 | 590 | 833.4 | |
| October | 427.6 | 595.7 | 769.6 | |
| November | 427.2 | 566.8 | 709.1 | |
| December | 385.2 | 496.5 | 617.8 |
All values in cubic feet per second (cfs).
Common questions
- When does Salt River above Reservoir, near Etna, WY normally run highest?
- May, on the long-term record. The median daily flow that month is about 1,581.9 cfs, against 420.8 cfs in February, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Salt River above Reservoir, near Etna, WY?
- It depends on the month. In January, half of days historically fall near 439.1 cfs, with the middle 80% of days between 336.5 and 548.5 cfs. The month-by-month table on this page gives the full range.
- How long has Salt River above Reservoir, near Etna, WY been measured?
- Discharge records at USGS site 13027500 begin in 1918, about 108 years, covering roughly 9,201 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Salt River above Reservoir, near Etna, 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 Salt River above Reservoir, near Etna, WY?
- The gauge sits at 43.07972, -111.03722, in Wyoming, in hydrologic subbasin 17040105, draining roughly 856 square miles.
- Can I use Salt River above Reservoir, near Etna, 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.