USGS Streamgage 09400350
Little Colorado River near Winslow, AZ
Little Colorado River near Winslow, AZ is USGS streamgage 09400350 in Arizona, monitoring river discharge in hydrologic subbasin 15020008. It drains a watershed of about 16,192 square miles. Discharge records at this site go back to 2001. Typical flow runs near 21.2 cfs in July and 52 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Arizona
- Drainage area
- 16,192 sq mi
- Gauge elevation
- 4,836 ft
- Subbasin (HUC-8)
- 15020008
- Coordinates
- 35.00673, -110.65428
- USGS site number
- 09400350
- Records begin
- 2001-12-13 (25 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 25 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 | 6.2 | 11.5 | 591.9 | |
| February | 5.8 | 22.5 | 1,017.1 | |
| March | 7.1 | 234.7 | 1,472.6 | |
| April | 6.1 | 52 | 1,020.1 | |
| May | 4 | 6.8 | 78.4 | |
| June | 2.9 | 4.3 | 18 | |
| July | 3.2 | 21.2 | 769.8 | |
| August | 2.8 | 56.3 | 1,088.4 | |
| September | 3 | 11.8 | 653.3 | |
| October | 4.1 | 7.8 | 395.2 | |
| November | 5.5 | 7.9 | 101.4 | |
| December | 6.1 | 9.6 | 232.8 |
All values in cubic feet per second (cfs).
Common questions
- When does Little Colorado River near Winslow, AZ normally run highest?
- March, on the long-term record. The median daily flow that month is about 234.7 cfs, against 4.3 cfs in June, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Little Colorado River near Winslow, AZ?
- It depends on the month. In January, half of days historically fall near 11.5 cfs, with the middle 80% of days between 6.2 and 591.9 cfs. The month-by-month table on this page gives the full range.
- How long has Little Colorado River near Winslow, AZ been measured?
- Discharge records at USGS site 09400350 begin in 2001, about 25 years, covering roughly 8,936 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Little Colorado River near Winslow, AZ?
- The gauge sits at 35.00673, -110.65428, in Arizona, in hydrologic subbasin 15020008, at an elevation of about 4,836 feet, draining roughly 16,192 square miles.
- Can I use Little Colorado River near Winslow, AZ 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.