USGS Streamgage 09502800
Williamson Valley Wash near Paulden, AZ
Williamson Valley Wash near Paulden, AZ is USGS streamgage 09502800 in Arizona, monitoring river discharge in hydrologic subbasin 15060201. It drains a watershed of about 255 square miles. Discharge records at this site go back to 1965. Typical flow runs near 0 cfs in July and 1.5 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Arizona
- Drainage area
- 255 sq mi
- Gauge elevation
- 4,455 ft
- Subbasin (HUC-8)
- 15060201
- Coordinates
- 34.86669, -112.61323
- USGS site number
- 09502800
- Records begin
- 1965-03-26 (61 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 62 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 | 0.2 | 2.2 | 22.6 | |
| February | 0.5 | 2.3 | 70.4 | |
| March | 0.5 | 2.3 | 69.1 | |
| April | 0.1 | 1.5 | 5.9 | |
| May | 0 | 0.6 | 2.7 | |
| June | 0 | 0 | 1.3 | |
| July | 0 | 0 | 1.9 | |
| August | 0 | 0.2 | 3.3 | |
| September | 0 | 0.3 | 2.2 | |
| October | 0 | 0.6 | 2.1 | |
| November | 0 | 1.3 | 3.5 | |
| December | 0 | 1.7 | 7.4 |
All values in cubic feet per second (cfs).
Common questions
- When does Williamson Valley Wash near Paulden, AZ normally run highest?
- February, on the long-term record. The median daily flow that month is about 2.3 cfs, against 0 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 Williamson Valley Wash near Paulden, AZ?
- It depends on the month. In January, half of days historically fall near 2.2 cfs, with the middle 80% of days between 0.2 and 22.6 cfs. The month-by-month table on this page gives the full range.
- How long has Williamson Valley Wash near Paulden, AZ been measured?
- Discharge records at USGS site 09502800 begin in 1965, about 61 years, covering roughly 9,122 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Williamson Valley Wash near Paulden, AZ?
- The gauge sits at 34.86669, -112.61323, in Arizona, in hydrologic subbasin 15060201, at an elevation of about 4,455 feet, draining roughly 255 square miles.
- Can I use Williamson Valley Wash near Paulden, 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.