Rivermatics

USGS Streamgage 12119000

Cedar River at Renton, WA

Cedar River at Renton, WA is USGS streamgage 12119000 in Washington, monitoring river discharge in hydrologic subbasin 17110012. It sits on the Cedar River, alongside 6 other gauges Rivermatics tracks on the same river. It drains a watershed of about 184 square miles. Discharge records at this site go back to 1906. Typical flow runs near 240.7 cfs in July and 732.7 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
Washington
Drainage area
184 sq mi
Gauge elevation
26 ft
Subbasin (HUC-8)
17110012
Coordinates
47.4826, -122.20345
USGS site number
12119000
Records begin
1906-11-15 (120 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Cedar River at Renton, 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
123 127 131
122 127 133
135 166 263
131 159 250
129 153 225
126 147 211
124 143 211
120 139 219
119 137 214
118 136 224
116 135 225
116 135 238
114 134 260
114 136 276

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 81 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 436.4 1,013.4 2,006.1
February 446.3 918.6 1,779.7
March 420.7 787.8 1,497.1
April 387.7 732.7 1,302.3
May 348.9 655.4 1,212.3
June 281.2 478.2 1,178.2
July 134.7 240.7 572.7
August 96.4 149.4 327.7
September 119.1 196.8 358.9
October 186.4 353.1 579.4
November 311 622.5 1,448.8
December 401.1 910.6 1,820.3

All values in cubic feet per second (cfs).

Common questions

When does Cedar River at Renton, WA normally run highest?
January, on the long-term record. The median daily flow that month is about 1,013.4 cfs, against 149.4 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 Cedar River at Renton, WA?
It depends on the month. In January, half of days historically fall near 1,013.4 cfs, with the middle 80% of days between 436.4 and 2,006.1 cfs. The month-by-month table on this page gives the full range.
How long has Cedar River at Renton, WA been measured?
Discharge records at USGS site 12119000 begin in 1906, about 120 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 Cedar River at Renton, 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. 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 Cedar River at Renton, WA?
The gauge sits at 47.4826, -122.20345, in Washington, in hydrologic subbasin 17110012, at an elevation of about 26 feet, draining roughly 184 square miles.
Can I use Cedar River at Renton, 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 Cedar River

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

Other gauges in this subbasin