USGS Streamgage 09503300
Granite Creek below Watson Lake near Prescott, AZ
Granite Creek below Watson Lake near Prescott, AZ is USGS streamgage 09503300 in Arizona, monitoring river discharge in hydrologic subbasin 15060202. It drains a watershed of about 47 square miles. Discharge records at this site go back to 1999. 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
- 47 sq mi
- Gauge elevation
- 5,020 ft
- Subbasin (HUC-8)
- 15060202
- Coordinates
- 34.61361, -112.41722
- USGS site number
- 09503300
- Records begin
- 1999-09-16 (27 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 27 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 | 0.2 | 15.5 | |
| February | 0 | 0.5 | 35.5 | |
| March | 0 | 0.5 | 52.4 | |
| April | 0 | 0 | 1.7 | |
| May | 0 | 0 | 1 | |
| June | 0 | 0 | 0.5 | |
| July | 0 | 0 | 2.4 | |
| August | 0 | 0 | 3.5 | |
| September | 0 | 0 | 2.2 | |
| October | 0 | 0 | 0.6 | |
| November | 0 | 0 | 1 | |
| December | 0 | 0.1 | 2.4 |
All values in cubic feet per second (cfs).
Common questions
- When does Granite Creek below Watson Lake near Prescott, AZ normally run highest?
- February, on the long-term record. The median daily flow that month is about 0.5 cfs, against 0 cfs in April, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Granite Creek below Watson Lake near Prescott, AZ?
- It depends on the month. In January, half of days historically fall near 0.2 cfs, with the middle 80% of days between 0 and 15.5 cfs. The month-by-month table on this page gives the full range.
- How long has Granite Creek below Watson Lake near Prescott, AZ been measured?
- Discharge records at USGS site 09503300 begin in 1999, about 27 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 Granite Creek below Watson Lake near Prescott, AZ?
- The gauge sits at 34.61361, -112.41722, in Arizona, in hydrologic subbasin 15060202, at an elevation of about 5,020 feet, draining roughly 47 square miles.
- Can I use Granite Creek below Watson Lake near Prescott, 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.