Rivermatics

USGS Streamgage 14308000

South Umpqua River at Tiller, OR

South Umpqua River at Tiller, OR is USGS streamgage 14308000 in Oregon, monitoring river discharge in hydrologic subbasin 17100302. It sits on the South Umpqua River, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 449 square miles. Discharge records at this site go back to 1910. Typical flow runs near 129.8 cfs in July and 1,292 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, alongside daily high and low water-temperature forecasts.

View live conditions & forecast →

Gauge details

State
Oregon
Drainage area
449 sq mi
Subbasin (HUC-8)
17100302
Coordinates
42.9304, -122.94839
USGS site number
14308000
Records begin
1910-10-01 (116 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for South Umpqua River at Tiller, OR. 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
43.9 45.6 47.2
43.4 47.5 56
44.5 51.4 66.7
42.7 49.2 61.7
40.2 45.4 53.7
38.2 42.8 49.6
36.7 41 46.8
35.6 39.8 45.4
34.6 38.8 44.1
34.1 38.3 43.5
33.3 37.5 42.6
32.7 36.9 42.1
31.9 36.1 41.4
31.3 35.6 40.8

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 116 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 400.5 1,282.6 4,979.4
February 510.3 1,349.7 3,981.7
March 584.3 1,399.4 3,355.5
April 604 1,292 2,514
May 379.7 884.6 1,916.5
June 165.6 388.6 968.8
July 76.7 129.8 233.2
August 42.9 66.2 105.1
September 37 54.4 108.4
October 42.6 78.4 352.6
November 83.2 432.4 2,223.4
December 228.7 1,025.9 4,696.8

All values in cubic feet per second (cfs).

Common questions

When does South Umpqua River at Tiller, OR normally run highest?
March, on the long-term record. The median daily flow that month is about 1,399.4 cfs, against 54.4 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for South Umpqua River at Tiller, OR?
It depends on the month. In January, half of days historically fall near 1,282.6 cfs, with the middle 80% of days between 400.5 and 4,979.4 cfs. The month-by-month table on this page gives the full range.
How long has South Umpqua River at Tiller, OR been measured?
Discharge records at USGS site 14308000 begin in 1910, about 116 years, covering roughly 9,200 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for South Umpqua River at Tiller, OR?
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. A companion model forecasts each day's water-temperature high and low. 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 South Umpqua River at Tiller, OR?
The gauge sits at 42.9304, -122.94839, in Oregon, in hydrologic subbasin 17100302, draining roughly 449 square miles.
Can I use South Umpqua River at Tiller, OR 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 South Umpqua River

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

Other gauges in this subbasin