Rivermatics

USGS Streamgage 12147500

North Fork Tolt River near Carnation, WA

North Fork Tolt River near Carnation, WA is USGS streamgage 12147500 in Washington, monitoring river discharge in hydrologic subbasin 17110010. It drains a watershed of about 40 square miles. Discharge records at this site go back to 1952. Typical flow runs near 153.5 cfs in July and 373.2 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
Washington
Drainage area
40 sq mi
Gauge elevation
758 ft
Subbasin (HUC-8)
17110010
Coordinates
47.71232, -121.78873
USGS site number
12147500
Records begin
1952-10-01 (74 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 64 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 189.2 370.5 1,122.7
February 183.3 337.5 803.9
March 191.5 322.1 666.4
April 241.5 373.2 673.7
May 217.8 379.9 673.2
June 155.9 296.3 591.2
July 99.7 153.5 316.5
August 61.2 86.1 179.2
September 49.2 90.6 314.7
October 65.2 173.4 602.9
November 142.8 357.7 1,010.1
December 188.3 368.2 1,022.3

All values in cubic feet per second (cfs).

Common questions

When does North Fork Tolt River near Carnation, WA normally run highest?
May, on the long-term record. The median daily flow that month is about 379.9 cfs, against 86.1 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 North Fork Tolt River near Carnation, WA?
It depends on the month. In January, half of days historically fall near 370.5 cfs, with the middle 80% of days between 189.2 and 1,122.7 cfs. The month-by-month table on this page gives the full range.
How long has North Fork Tolt River near Carnation, WA been measured?
Discharge records at USGS site 12147500 begin in 1952, about 74 years, covering roughly 9,100 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is North Fork Tolt River near Carnation, WA?
The gauge sits at 47.71232, -121.78873, in Washington, in hydrologic subbasin 17110010, at an elevation of about 758 feet, draining roughly 40 square miles.
Can I use North Fork Tolt River near Carnation, 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