Rivermatics

USGS Streamgage 12106700

Green River at Purification Plant near Palmer, WA

Green River at Purification Plant near Palmer, WA is USGS streamgage 12106700 in Washington, monitoring river discharge in hydrologic subbasin 17110013. It sits on the Green River, alongside 7 other gauges Rivermatics tracks on the same river. It drains a watershed of about 231 square miles. Discharge records at this site go back to 1963. Typical flow runs near 221.2 cfs in July and 1,118.1 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.

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Gauge details

State
Washington
Drainage area
231 sq mi
Gauge elevation
888 ft
Subbasin (HUC-8)
17110013
Coordinates
47.3051, -121.85066
USGS site number
12106700
Records begin
1963-07-01 (63 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Green River at Purification Plant near Palmer, WA. 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
150 160 171
146 160 183
149 177 261
150 180 266
147 179 278
145 179 284
142 178 285
140 177 285
139 180 293
140 184 302
138 186 316
137 191 340
134 188 349
137 205 404

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 63 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 412.8 1,061.4 3,861.9
February 403.3 948.1 3,118.3
March 413.3 891.2 2,232.9
April 519 1,118.1 2,262.3
May 363.3 1,053 2,334.8
June 175.4 531.6 1,518.9
July 128.7 221.2 628.4
August 115.6 147.8 226.2
September 116.6 204.5 427.5
October 135.4 374 1,178.2
November 277.9 865.1 2,931.3
December 377.4 960.3 3,431

All values in cubic feet per second (cfs).

Common questions

When does Green River at Purification Plant near Palmer, WA normally run highest?
April, on the long-term record. The median daily flow that month is about 1,118.1 cfs, against 147.8 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Green River at Purification Plant near Palmer, WA?
It depends on the month. In January, half of days historically fall near 1,061.4 cfs, with the middle 80% of days between 412.8 and 3,861.9 cfs. The month-by-month table on this page gives the full range.
How long has Green River at Purification Plant near Palmer, WA been measured?
Discharge records at USGS site 12106700 begin in 1963, about 63 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 Green River at Purification Plant near Palmer, WA?
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 Green River at Purification Plant near Palmer, WA?
The gauge sits at 47.3051, -121.85066, in Washington, in hydrologic subbasin 17110013, at an elevation of about 888 feet, draining roughly 231 square miles.
Can I use Green River at Purification Plant near Palmer, WA 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 Green River

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

Other gauges in this subbasin