Rivermatics

USGS Streamgage 12090500

Clover Creek near Tillicum, WA

Clover Creek near Tillicum, WA is USGS streamgage 12090500 in Washington, monitoring river discharge in hydrologic subbasin 17110019. It drains a watershed of about 74 square miles. Discharge records at this site go back to 1949. Typical flow runs near 10.2 cfs in July and 52 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.

View live conditions & forecast →

Gauge details

State
Washington
Drainage area
74 sq mi
Gauge elevation
275 ft
Subbasin (HUC-8)
17110019
Coordinates
47.1459, -122.51038
USGS site number
12090500
Records begin
1949-07-01 (77 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Clover Creek near Tillicum, 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
0.1 0.2 0.3
0 0.2 0.4
0.1 0.5 4
0.1 0.5 4.2
0 0.4 2
0 0.3 1.3
0 0.3 1.1
0 0.3 0.9
0 0.3 0.8
0 0.3 0.7
0 0.3 0.7
0 0.3 0.7
0 0.3 0.7
0 0.3 0.7

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 77 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 19.7 62.2 176.2
February 23.3 68.1 169.4
March 29.2 68.5 167.1
April 26.9 52 115.4
May 16.9 31.7 74.1
June 7.6 20.2 44.5
July 1.7 10.2 21.6
August 0.1 3.4 10.6
September 0 1.7 8.2
October 0 2.3 11.4
November 0.1 11.4 37.1
December 4.8 33.5 106.2

All values in cubic feet per second (cfs).

Common questions

When does Clover Creek near Tillicum, WA normally run highest?
March, on the long-term record. The median daily flow that month is about 68.5 cfs, against 1.7 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 Clover Creek near Tillicum, WA?
It depends on the month. In January, half of days historically fall near 62.2 cfs, with the middle 80% of days between 19.7 and 176.2 cfs. The month-by-month table on this page gives the full range.
How long has Clover Creek near Tillicum, WA been measured?
Discharge records at USGS site 12090500 begin in 1949, about 77 years, covering roughly 9,192 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Clover Creek near Tillicum, 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 Clover Creek near Tillicum, WA?
The gauge sits at 47.1459, -122.51038, in Washington, in hydrologic subbasin 17110019, at an elevation of about 275 feet, draining roughly 74 square miles.
Can I use Clover Creek near Tillicum, 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.

Other gauges in this subbasin