USGS Streamgage 06600300
West Branch Floyd River near Struble, IA
West Branch Floyd River near Struble, IA is USGS streamgage 06600300 in Iowa, monitoring river discharge in hydrologic subbasin 10230002. It drains a watershed of about 180 square miles. Discharge records at this site go back to 1955. Typical flow runs near 21 cfs in July and 28.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Iowa
- Drainage area
- 180 sq mi
- Gauge elevation
- 1,252 ft
- Subbasin (HUC-8)
- 10230002
- Coordinates
- 42.92388, -96.17697
- USGS site number
- 06600300
- Records begin
- 1955-10-01 (71 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 40 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 | 0 | 1.7 | 43.9 | |
| February | 0 | 5.2 | 97.1 | |
| March | 1.3 | 23.6 | 295 | |
| April | 2.3 | 28.2 | 285.5 | |
| May | 1.8 | 25.4 | 186.8 | |
| June | 1.6 | 37.2 | 278.1 | |
| July | 1.3 | 21 | 156.8 | |
| August | 1.2 | 9.4 | 72.5 | |
| September | 0.7 | 7.3 | 61.9 | |
| October | 0.9 | 6.8 | 68.5 | |
| November | 0.8 | 6.9 | 79.5 | |
| December | 0.4 | 4 | 56.6 |
All values in cubic feet per second (cfs).
Common questions
- When does West Branch Floyd River near Struble, IA normally run highest?
- June, on the long-term record. The median daily flow that month is about 37.2 cfs, against 1.7 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 West Branch Floyd River near Struble, IA?
- It depends on the month. In January, half of days historically fall near 1.7 cfs, with the middle 80% of days between 0 and 43.9 cfs. The month-by-month table on this page gives the full range.
- How long has West Branch Floyd River near Struble, IA been measured?
- Discharge records at USGS site 06600300 begin in 1955, about 71 years. The long record is what makes the monthly percentiles on this page meaningful.
- Where is West Branch Floyd River near Struble, IA?
- The gauge sits at 42.92388, -96.17697, in Iowa, in hydrologic subbasin 10230002, at an elevation of about 1,252 feet, draining roughly 180 square miles.
- Can I use West Branch Floyd River near Struble, 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.