Rivermatics

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 sits on the Granite Creek, alongside 2 other gauges Rivermatics tracks on the same river. 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. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

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)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Granite Creek below Watson Lake near Prescott, AZ. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0.1
0 0 0
0 0 0
0 0 0

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

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.

Historical monthly discharge percentiles in cubic feet per second
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 9,130 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Granite Creek below Watson Lake near Prescott, AZ?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
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.

Upstream and downstream on the Granite Creek

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Granite Creek in full.

Other gauges in this subbasin