USGS Streamgage 06602400
Monona-Harrison Ditch near Turin, IA
Monona-Harrison Ditch near Turin, IA is USGS streamgage 06602400 in Iowa, monitoring river discharge in hydrologic subbasin 10230004. It drains a watershed of about 900 square miles. Discharge records at this site go back to 1940. Typical flow runs near 219 cfs in July and 251.7 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
- Iowa
- Drainage area
- 900 sq mi
- Gauge elevation
- 1,048 ft
- Subbasin (HUC-8)
- 10230004
- Coordinates
- 41.96492, -95.99175
- USGS site number
- 06602400
- Records begin
- 1940-06-04 (86 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Monona-Harrison Ditch near Turin, 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 |
|---|---|---|---|---|
| 95.1 | 103 | 111 | ||
| 79.2 | 90.5 | 106 | ||
| 70.6 | 82 | 98.4 | ||
| 68 | 82.7 | 125 | ||
| 68.7 | 95.1 | 211 | ||
| 71.2 | 106 | 258 | ||
| 79.5 | 143 | 435 | ||
| 93 | 189 | 503 | ||
| 92.5 | 190 | 479 | ||
| 93.5 | 185 | 420 | ||
| 85.2 | 162 | 355 | ||
| 76.8 | 139 | 300 | ||
| 71.1 | 124 | 256 | ||
| 66.4 | 112 | 215 |
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 68 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 | 31.2 | 95.4 | 263.1 | |
| February | 32.7 | 127.1 | 555.8 | |
| March | 64.4 | 214.8 | 1,108.6 | |
| April | 67.9 | 251.7 | 865.1 | |
| May | 79.4 | 280.2 | 982.7 | |
| June | 101.7 | 327.3 | 1,391.8 | |
| July | 67.7 | 219 | 726.4 | |
| August | 46.3 | 147.2 | 451 | |
| September | 41.3 | 129.8 | 397.5 | |
| October | 45 | 117.7 | 436 | |
| November | 44.4 | 125.6 | 359.1 | |
| December | 32.8 | 103.8 | 327.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Monona-Harrison Ditch near Turin, IA normally run highest?
- June, on the long-term record. The median daily flow that month is about 327.3 cfs, against 95.4 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 Monona-Harrison Ditch near Turin, IA?
- It depends on the month. In January, half of days historically fall near 95.4 cfs, with the middle 80% of days between 31.2 and 263.1 cfs. The month-by-month table on this page gives the full range.
- How long has Monona-Harrison Ditch near Turin, IA been measured?
- Discharge records at USGS site 06602400 begin in 1940, about 86 years, covering roughly 9,198 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Monona-Harrison Ditch near Turin, 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 Monona-Harrison Ditch near Turin, IA?
- The gauge sits at 41.96492, -95.99175, in Iowa, in hydrologic subbasin 10230004, at an elevation of about 1,048 feet, draining roughly 900 square miles.
- Can I use Monona-Harrison Ditch near Turin, 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.