Rivermatics

USGS Streamgage 14152000

Middle Fork Willamette River at Jasper, OR

Middle Fork Willamette River at Jasper, OR is USGS streamgage 14152000 in Oregon, monitoring river discharge in hydrologic subbasin 17090001. It sits on the Middle Fork Willamette River, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 1,340 square miles. Discharge records at this site go back to 1905. Typical flow runs near 1,955.2 cfs in July and 2,855.3 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
1,340 sq mi
Subbasin (HUC-8)
17090001
Coordinates
43.99818, -122.90591
USGS site number
14152000
Records begin
1905-09-01 (121 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Middle Fork Willamette River at Jasper, 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
2,289 2,340 2,395
2,275 2,359 2,521
2,267 2,373 2,636
2,240 2,357 2,861
2,228 2,357 2,980
2,214 2,358 3,070
2,196 2,357 3,087
2,181 2,359 3,069
2,168 2,363 3,108
2,155 2,366 3,144
2,145 2,372 3,188
2,130 2,374 3,201
2,123 2,382 3,235
2,110 2,384 3,292

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 119 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 2,061 5,579.7 14,171
February 1,621 2,791.4 9,900.7
March 1,562.3 2,591.6 8,099.4
April 1,552 2,855.3 6,779.3
May 1,520.6 3,593.9 6,603.5
June 1,414.7 2,746.7 5,580.7
July 1,264.2 1,955.2 2,898.1
August 1,147.1 2,255.2 3,205.5
September 1,086.7 2,640.7 4,299
October 1,178.4 3,118.1 4,850.3
November 1,681.3 4,646.3 9,935.3
December 1,784.5 5,283.9 14,687.1

All values in cubic feet per second (cfs).

Common questions

When does Middle Fork Willamette River at Jasper, OR normally run highest?
January, on the long-term record. The median daily flow that month is about 5,579.7 cfs, against 1,955.2 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Middle Fork Willamette River at Jasper, OR?
It depends on the month. In January, half of days historically fall near 5,579.7 cfs, with the middle 80% of days between 2,061 and 14,171 cfs. The month-by-month table on this page gives the full range.
How long has Middle Fork Willamette River at Jasper, OR been measured?
Discharge records at USGS site 14152000 begin in 1905, about 121 years, covering roughly 9,201 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Middle Fork Willamette River at Jasper, 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 Middle Fork Willamette River at Jasper, OR?
The gauge sits at 43.99818, -122.90591, in Oregon, in hydrologic subbasin 17090001, draining roughly 1,340 square miles.
Can I use Middle Fork Willamette River at Jasper, 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 Middle Fork Willamette River

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

Other gauges in this subbasin