USGS Streamgage 09426620
Bill Williams River near Parker, AZ
Bill Williams River near Parker, AZ is USGS streamgage 09426620 in Arizona, monitoring river discharge in hydrologic subbasin 15030204. It drains a watershed of about 5,337 square miles. Discharge records at this site go back to 1988. Typical flow runs near 0.7 cfs in July and 9.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Arizona
- Drainage area
- 5,337 sq mi
- Gauge elevation
- 502 ft
- Subbasin (HUC-8)
- 15030204
- Coordinates
- 34.26124, -114.02898
- USGS site number
- 09426620
- Records begin
- 1988-10-01 (38 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 38 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 | 10.6 | 23.5 | |
| February | 0 | 11.9 | 263.4 | |
| March | 2.1 | 11.9 | 722.3 | |
| April | 0.8 | 9.7 | 297 | |
| May | 0 | 6.4 | 39.9 | |
| June | 0 | 3.2 | 18.6 | |
| July | 0 | 0.7 | 15.2 | |
| August | 0 | 0.2 | 13.7 | |
| September | 0 | 1.5 | 15.8 | |
| October | 0 | 4.2 | 16.6 | |
| November | 0 | 8.1 | 19.2 | |
| December | 0 | 9.6 | 20.4 |
All values in cubic feet per second (cfs).
Common questions
- When does Bill Williams River near Parker, AZ normally run highest?
- February, on the long-term record. The median daily flow that month is about 11.9 cfs, against 0.2 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Bill Williams River near Parker, AZ?
- It depends on the month. In January, half of days historically fall near 10.6 cfs, with the middle 80% of days between 0 and 23.5 cfs. The month-by-month table on this page gives the full range.
- How long has Bill Williams River near Parker, AZ been measured?
- Discharge records at USGS site 09426620 begin in 1988, about 38 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 Bill Williams River near Parker, AZ?
- The gauge sits at 34.26124, -114.02898, in Arizona, in hydrologic subbasin 15030204, at an elevation of about 502 feet, draining roughly 5,337 square miles.
- Can I use Bill Williams River near Parker, 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.