USGS Streamgage 06609500
Boyer River at Logan, IA
Boyer River at Logan, IA is USGS streamgage 06609500 in Iowa, monitoring river discharge in hydrologic subbasin 10230007. It drains a watershed of about 871 square miles. Discharge records at this site go back to 1881. Typical flow runs near 315.8 cfs in July and 278 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.
View live conditions & forecast →
Gauge details
- State
- Iowa
- Drainage area
- 871 sq mi
- Gauge elevation
- 1,024 ft
- Subbasin (HUC-8)
- 10230007
- Coordinates
- 41.64169, -95.78233
- USGS site number
- 06609500
- Records begin
- 1881-05-01 (145 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Boyer River at Logan, IA. 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 |
|---|---|---|---|---|
| 283 | 302 | 327 | ||
| 244 | 269 | 309 | ||
| 219 | 243 | 286 | ||
| 206 | 237 | 356 | ||
| 200 | 253 | 522 | ||
| 199 | 329 | 891 | ||
| 211 | 376 | 1,054 | ||
| 290 | 686 | 1,988 | ||
| 353 | 817 | 1,991 | ||
| 317 | 648 | 1,443 | ||
| 285 | 511 | 1,041 | ||
| 239 | 396 | 786 | ||
| 218 | 342 | 658 | ||
| 202 | 301 | 539 |
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 108 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 | 18 | 97.3 | 411.4 | |
| February | 30.8 | 173 | 784.7 | |
| March | 82.5 | 324 | 1,300.6 | |
| April | 72.6 | 278 | 990.7 | |
| May | 70.2 | 356.3 | 1,325.8 | |
| June | 81.4 | 466.8 | 1,819 | |
| July | 64.4 | 315.8 | 1,040 | |
| August | 41.5 | 199.9 | 795.4 | |
| September | 30.9 | 140.7 | 676.2 | |
| October | 30.5 | 128.8 | 666.5 | |
| November | 40.8 | 141.6 | 517.4 | |
| December | 30.5 | 117 | 435.3 |
All values in cubic feet per second (cfs).
Common questions
- When does Boyer River at Logan, IA normally run highest?
- June, on the long-term record. The median daily flow that month is about 466.8 cfs, against 97.3 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Boyer River at Logan, IA?
- It depends on the month. In January, half of days historically fall near 97.3 cfs, with the middle 80% of days between 18 and 411.4 cfs. The month-by-month table on this page gives the full range.
- How long has Boyer River at Logan, IA been measured?
- Discharge records at USGS site 06609500 begin in 1881, about 145 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 Boyer River at Logan, IA?
- 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 Boyer River at Logan, IA?
- The gauge sits at 41.64169, -95.78233, in Iowa, in hydrologic subbasin 10230007, at an elevation of about 1,024 feet, draining roughly 871 square miles.
- Can I use Boyer River at Logan, IA 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.