When does Cedar River near Landsburg, WA normally run highest?

January, on the long-term record. The median daily flow that month is about 900.6 cfs, against 300.2 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 Cedar River near Landsburg, WA?

It depends on the month. In January, half of days historically fall near 900.6 cfs, with the middle 80% of days between 454.5 and 1,681.9 cfs. The month-by-month table on this page gives the full range.

How long has Cedar River near Landsburg, WA been measured?

Discharge records at USGS site 12117500 begin in 1895, about 131 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 near Landsburg, 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 near Landsburg, WA?

The gauge sits at 47.39369, -121.95454, in Washington, in hydrologic subbasin 17110012, at an elevation of about 571 feet, draining roughly 121 square miles.

Can I use Cedar River near Landsburg, 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.

USGS Streamgage 12117500

Cedar River near Landsburg, WA

Cedar River near Landsburg, WA is USGS streamgage 12117500 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 121 square miles. Discharge records at this site go back to 1895. Typical flow runs near 408.4 cfs in July and 727.3 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: Washington
Drainage area: 121 sq mi
Gauge elevation: 571 ft
Subbasin (HUC-8): 17110012
Coordinates: 47.39369, -121.95454
USGS site number: 12117500
Records begin: 1895-08-01 (131 years)
Rivermatics forecast: 14-day flow outlook + water temperature

14-day flow forecast

Based on observations through September 11 for Cedar River near Landsburg, 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
September 12	217	222	226
September 13	229	257	362
September 14	227	255	351
September 15	222	244	312
September 16	217	235	283
September 17	214	231	269
September 18	211	227	261
September 19	209	225	257
September 20	207	224	254
September 21	205	222	252
September 22	204	221	253
September 23	206	226	268
September 24	215	246	321
September 25	214	249	330

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 131 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
January	454.5	900.6	1,681.9
February	462	795.8	1,449
March	449.2	714.6	1,220.3
April	439.2	727.3	1,178.7
May	427.1	753.2	1,176.1
June	392.7	638.3	1,183.1
July	314.2	408.4	717.9
August	237.1	316.4	472.8
September	225.1	300.2	430.7
October	227.4	384	604.9
November	289.6	582.4	1,295
December	425	779.2	1,539.7

All values in cubic feet per second (cfs).

Common questions

When does Cedar River near Landsburg, WA normally run highest?: January, on the long-term record. The median daily flow that month is about 900.6 cfs, against 300.2 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 Cedar River near Landsburg, WA?: It depends on the month. In January, half of days historically fall near 900.6 cfs, with the middle 80% of days between 454.5 and 1,681.9 cfs. The month-by-month table on this page gives the full range.
How long has Cedar River near Landsburg, WA been measured?: Discharge records at USGS site 12117500 begin in 1895, about 131 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 near Landsburg, 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 near Landsburg, WA?: The gauge sits at 47.39369, -121.95454, in Washington, in hydrologic subbasin 17110012, at an elevation of about 571 feet, draining roughly 121 square miles.
Can I use Cedar River near Landsburg, 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.

Cedar River below Bear Creek near Cedar Falls, WA 25 sq mi
Cedar River near Cedar Falls, WA 41 sq mi
Cedar River at Powerplant at Cedar Falls, WA 84 sq mi
Cedar River at Cedar Falls, WA 84 sq mi
Cedar River near Landsburg, WA this page
Cedar River below Diversion near Landsburg, WA 134 sq mi
Cedar River at Renton, WA 184 sq mi