USGS Streamgage 13185000
Boise River near Twin Springs, ID
Boise River near Twin Springs, ID is USGS streamgage 13185000 in Idaho, monitoring river discharge in hydrologic subbasin 17050112. It sits on the Boise River, alongside 4 other gauges Rivermatics tracks on the same river. It drains a watershed of about 832 square miles. Discharge records at this site go back to 1871. Typical flow runs near 985 cfs in July and 1,916.3 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
- 832 sq mi
- Subbasin (HUC-8)
- 17050112
- Coordinates
- 43.66806, -115.72528
- USGS site number
- 13185000
- Records begin
- 1871-06-01 (155 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Boise River near Twin Springs, 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 |
|---|---|---|---|---|
| 293 | 303 | 312 | ||
| 284 | 296 | 307 | ||
| 276 | 290 | 302 | ||
| 271 | 286 | 299 | ||
| 267 | 283 | 297 | ||
| 263 | 280 | 295 | ||
| 260 | 278 | 294 | ||
| 257 | 276 | 294 | ||
| 253 | 273 | 292 | ||
| 250 | 270 | 290 | ||
| 246 | 267 | 289 | ||
| 243 | 265 | 288 | ||
| 240 | 263 | 287 | ||
| 238 | 261 | 286 |
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 115 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 | 283.9 | 397.4 | 677.8 | |
| February | 309.9 | 446.8 | 822.2 | |
| March | 427.8 | 732.9 | 1,589.3 | |
| April | 949.8 | 1,916.3 | 3,857.7 | |
| May | 1,830.6 | 3,411.3 | 6,124.5 | |
| June | 1,241 | 2,944 | 5,620.7 | |
| July | 439.6 | 985 | 2,143.2 | |
| August | 273.1 | 430 | 672.1 | |
| September | 253.1 | 350.9 | 488.1 | |
| October | 276.7 | 367 | 513 | |
| November | 291.6 | 395.9 | 630.3 | |
| December | 269.1 | 389.8 | 687.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Boise River near Twin Springs, ID normally run highest?
- May, on the long-term record. The median daily flow that month is about 3,411.3 cfs, against 350.9 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 Boise River near Twin Springs, ID?
- It depends on the month. In January, half of days historically fall near 397.4 cfs, with the middle 80% of days between 283.9 and 677.8 cfs. The month-by-month table on this page gives the full range.
- How long has Boise River near Twin Springs, ID been measured?
- Discharge records at USGS site 13185000 begin in 1871, about 155 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 Boise River near Twin Springs, 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 Boise River near Twin Springs, ID?
- The gauge sits at 43.66806, -115.72528, in Idaho, in hydrologic subbasin 17050112, draining roughly 832 square miles.
- Can I use Boise River near Twin Springs, 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 Boise River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Boise River in full.
- Boise River near Twin Springs, ID this page
- Boise River at Glenwood Bridge near Boise, ID 2,773 sq mi
- Boise River at Caldwell, ID 3,363 sq mi
- Boise River near Parma, ID 3,906 sq mi
- Boise River above Indian Creek at Caldwell, ID