USGS Streamgage 09383400
Little Colorado River at Greer, AZ
Little Colorado River at Greer, AZ is USGS streamgage 09383400 in Arizona, monitoring river discharge in hydrologic subbasin 15020001. It drains a watershed of about 29 square miles. Discharge records at this site go back to 1960. Typical flow runs near 8.8 cfs in July and 21.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Arizona
- Drainage area
- 29 sq mi
- Gauge elevation
- 8,294 ft
- Subbasin (HUC-8)
- 15020001
- Coordinates
- 34.01589, -109.45708
- USGS site number
- 09383400
- Records begin
- 1960-08-01 (66 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 66 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 | 0.6 | 4.3 | 9 | |
| February | 0.7 | 5.1 | 13.4 | |
| March | 2.1 | 7.5 | 29.1 | |
| April | 6.5 | 21.7 | 91.4 | |
| May | 7.8 | 23.2 | 72.2 | |
| June | 4.4 | 12.6 | 43.9 | |
| July | 4.9 | 8.8 | 22.5 | |
| August | 5.4 | 10.8 | 23 | |
| September | 2.8 | 6.9 | 21.3 | |
| October | 0.4 | 2.8 | 11 | |
| November | 0.4 | 2.6 | 9.4 | |
| December | 0.5 | 3.3 | 9.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Little Colorado River at Greer, AZ normally run highest?
- May, on the long-term record. The median daily flow that month is about 23.2 cfs, against 2.6 cfs in November, 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 at Greer, AZ?
- It depends on the month. In January, half of days historically fall near 4.3 cfs, with the middle 80% of days between 0.6 and 9 cfs. The month-by-month table on this page gives the full range.
- How long has Little Colorado River at Greer, AZ been measured?
- Discharge records at USGS site 09383400 begin in 1960, about 66 years, covering roughly 6,638 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Little Colorado River at Greer, AZ?
- The gauge sits at 34.01589, -109.45708, in Arizona, in hydrologic subbasin 15020001, at an elevation of about 8,294 feet, draining roughly 29 square miles.
- Can I use Little Colorado River at Greer, 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.