USGS Streamgage 13047600
Fall River near Ashton, ID
Fall River near Ashton, ID is USGS streamgage 13047600 in Idaho, monitoring river discharge in hydrologic subbasin 17040203. It sits on the Fall River, alongside 3 other gauges Rivermatics tracks on the same river. It drains a watershed of about 337 square miles. Discharge records at this site go back to 1993. Typical flow runs near 632.1 cfs in July and 796.5 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
- Idaho
- Drainage area
- 337 sq mi
- Subbasin (HUC-8)
- 17040203
- Coordinates
- 44.05611, -111.35861
- USGS site number
- 13047600
- Records begin
- 1993-11-16 (33 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Fall River near Ashton, ID. 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 |
|---|---|---|---|---|
| 422 | 431 | 440 | ||
| 418 | 430 | 441 | ||
| 416 | 429 | 444 | ||
| 412 | 428 | 444 | ||
| 406 | 426 | 443 | ||
| 401 | 424 | 444 | ||
| 399 | 424 | 447 | ||
| 393 | 423 | 449 | ||
| 389 | 422 | 451 | ||
| 387 | 421 | 452 | ||
| 382 | 420 | 453 | ||
| 378 | 419 | 453 | ||
| 377 | 419 | 455 | ||
| 377 | 419 | 457 |
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 33 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 | 373.7 | 457.1 | 567.4 | |
| February | 367.2 | 439.6 | 541.1 | |
| March | 381.7 | 453.6 | 621.9 | |
| April | 483.6 | 796.5 | 1,327.2 | |
| May | 1,307.2 | 2,020 | 3,055.8 | |
| June | 832.9 | 1,895.7 | 3,196.3 | |
| July | 381.5 | 632.1 | 1,361.4 | |
| August | 399.2 | 549.3 | 803.9 | |
| September | 405.6 | 529.9 | 739.7 | |
| October | 439.6 | 539.8 | 699.8 | |
| November | 430.2 | 534.1 | 706.3 | |
| December | 403.5 | 485.4 | 607.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Fall River near Ashton, ID normally run highest?
- May, on the long-term record. The median daily flow that month is about 2,020 cfs, against 439.6 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 Fall River near Ashton, ID?
- It depends on the month. In January, half of days historically fall near 457.1 cfs, with the middle 80% of days between 373.7 and 567.4 cfs. The month-by-month table on this page gives the full range.
- How long has Fall River near Ashton, ID been measured?
- Discharge records at USGS site 13047600 begin in 1993, about 33 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 Fall River near Ashton, ID?
- 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 Fall River near Ashton, ID?
- The gauge sits at 44.05611, -111.35861, in Idaho, in hydrologic subbasin 17040203, draining roughly 337 square miles.
- Can I use Fall River near Ashton, ID 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 Fall River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Fall River in full.
- Fall River Ab Yellowstone Canal near Squirrel, ID 323 sq mi
- Fall River near Squirrel, ID 329 sq mi
- Fall River near Ashton, ID this page
- Fall River near Chester, ID 503 sq mi