USGS Streamgage 09516500
Hassayampa River near Morristown, AZ
Hassayampa River near Morristown, AZ is USGS streamgage 09516500 in Arizona, monitoring river discharge in hydrologic subbasin 15070103. It drains a watershed of about 796 square miles. Discharge records at this site go back to 1938. Typical flow runs near 0 cfs in July and 0.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Arizona
- Drainage area
- 796 sq mi
- Gauge elevation
- 1,832 ft
- Subbasin (HUC-8)
- 15070103
- Coordinates
- 33.88505, -112.66213
- USGS site number
- 09516500
- Records begin
- 1938-10-01 (88 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 88 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 | 0.6 | 25.4 | |
| February | 0 | 1.1 | 103.4 | |
| March | 0 | 1 | 176.2 | |
| April | 0 | 0.2 | 68.7 | |
| May | 0 | 0 | 10.2 | |
| June | 0 | 0 | 0.6 | |
| July | 0 | 0 | 2.5 | |
| August | 0 | 0 | 13.4 | |
| September | 0 | 0 | 12 | |
| October | 0 | 0 | 0.9 | |
| November | 0 | 0 | 1.3 | |
| December | 0 | 0 | 2.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Hassayampa River near Morristown, AZ normally run highest?
- February, on the long-term record. The median daily flow that month is about 1.1 cfs, against 0 cfs in May, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Hassayampa River near Morristown, AZ?
- It depends on the month. In January, half of days historically fall near 0.6 cfs, with the middle 80% of days between 0 and 25.4 cfs. The month-by-month table on this page gives the full range.
- How long has Hassayampa River near Morristown, AZ been measured?
- Discharge records at USGS site 09516500 begin in 1938, about 88 years, covering roughly 8,761 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Hassayampa River near Morristown, AZ?
- The gauge sits at 33.88505, -112.66213, in Arizona, in hydrologic subbasin 15070103, at an elevation of about 1,832 feet, draining roughly 796 square miles.
- Can I use Hassayampa River near Morristown, 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.