Rivermatics

USGS Streamgage 09400815

Newman Canyon above Upper Lake Mary, AZ

Newman Canyon above Upper Lake Mary, AZ is USGS streamgage 09400815 in Arizona, monitoring river discharge in hydrologic subbasin 15020015. It drains a watershed of about 22 square miles. Discharge records at this site go back to 2014. Typical flow runs near 0 cfs in July and 0.1 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
22 sq mi
Gauge elevation
6,860 ft
Subbasin (HUC-8)
15020015
Coordinates
35.05494, -111.48922
USGS site number
09400815
Records begin
2014-08-21 (12 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Newman Canyon above Upper Lake Mary, 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
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 12 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 0.1 34.2
February 0 1.7 101.1
March 0 5.7 134.7
April 0 0.1 97.4
May 0 0 2.4
June 0 0 0
July 0 0 0.1
August 0 0 1.2
September 0 0 0.2
October 0 0 0
November 0 0 7.9
December 0 0 25

All values in cubic feet per second (cfs).

Common questions

When does Newman Canyon above Upper Lake Mary, AZ normally run highest?
March, on the long-term record. The median daily flow that month is about 5.7 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 Newman Canyon above Upper Lake Mary, AZ?
It depends on the month. In January, half of days historically fall near 0.1 cfs, with the middle 80% of days between 0 and 34.2 cfs. The month-by-month table on this page gives the full range.
How long has Newman Canyon above Upper Lake Mary, AZ been measured?
Discharge records at USGS site 09400815 begin in 2014, about 12 years, covering roughly 4,365 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Newman Canyon above Upper Lake Mary, 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 Newman Canyon above Upper Lake Mary, AZ?
The gauge sits at 35.05494, -111.48922, in Arizona, in hydrologic subbasin 15020015, at an elevation of about 6,860 feet, draining roughly 22 square miles.
Can I use Newman Canyon above Upper Lake Mary, 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.

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