USGS Streamgage 09486800
Altar Wash near Three Points, AZ
Altar Wash near Three Points, AZ is USGS streamgage 09486800 in Arizona, monitoring river discharge in hydrologic subbasin 15050304. It drains a watershed of about 463 square miles. Discharge records at this site go back to 1966. Typical flow runs near 0 cfs in July and 0 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Arizona
- Drainage area
- 463 sq mi
- Gauge elevation
- 2,975 ft
- Subbasin (HUC-8)
- 15050304
- Coordinates
- 31.83908, -111.40427
- USGS site number
- 09486800
- Records begin
- 1966-01-11 (60 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 60 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 | 0 | 0 | |
| February | 0 | 0 | 0 | |
| March | 0 | 0 | 0 | |
| April | 0 | 0 | 0 | |
| May | 0 | 0 | 0 | |
| June | 0 | 0 | 0.1 | |
| July | 0 | 0 | 42.4 | |
| August | 0 | 0 | 42.2 | |
| September | 0 | 0 | 26.2 | |
| October | 0 | 0 | 0 | |
| November | 0 | 0 | 0 | |
| December | 0 | 0 | 0 |
All values in cubic feet per second (cfs).
Common questions
- When does Altar Wash near Three Points, AZ normally run highest?
- January, on the long-term record. The median daily flow that month is about 0 cfs, against 0 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 Altar Wash near Three Points, AZ?
- It depends on the month. In January, half of days historically fall near 0 cfs, with the middle 80% of days between 0 and 0 cfs. The month-by-month table on this page gives the full range.
- How long has Altar Wash near Three Points, AZ been measured?
- Discharge records at USGS site 09486800 begin in 1966, about 60 years, covering roughly 9,126 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Altar Wash near Three Points, AZ?
- The gauge sits at 31.83908, -111.40427, in Arizona, in hydrologic subbasin 15050304, at an elevation of about 2,975 feet, draining roughly 463 square miles.
- Can I use Altar Wash near Three Points, 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.