Thelon River at the Outlet of Double Barrel Lake water level

Name: Thelon River at the Outlet of Double Barrel Lake water level (Environment and Climate Change Canada – Water Survey of Canada)
Creator: Environment and Climate Change Canada – Water Survey of Canada
License: https://open.canada.ca/en/open-government-licence-canada

River gauge, Thelon River, Northwest Territories, Canada

Directions

Normal for mid-October

Flow

154m³/s Down 10.0 m³/s over the last 24 hours

Measured Oct 20, 2026, 11:15 PM CST (2 hours ago)

History

7 days 30 days

Flow Normal range (10–90 %)

What this means

The Thelon River at the Outlet of Double Barrel Lake is at 154 m³/s, in the normal range for mid-October.

The median for mid-October is 126 m³/s, based on 7 years of readings, so the flow is 28.0 m³/s above typical.

It has dropped 10.00 m³/s over the past 24 hours. In the last month it has stayed between 132 m³/s and 178 m³/s.

Fall is often low-water season on rivers, until steadier rain returns.

Compared with 7 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 126 m³/s28.0 m³/s above the median for this date
Normal for this date: 56.9 m³/s – 259 m³/s8 years in 10 fall in this range (7 years of records)
Lowest and highest in 30 days: 132 m³/s – 178 m³/s
Lowest and highest in 12 months: 131 m³/s – 178 m³/s

On the river

Outside the spring freshet, most rivers settle into a gentler pattern, broken by storms.

Flood advisories come from the provincial river forecast centre.

About the Thelon River

The Thelon River stretches 900 kilometres (560 mi) across northern Canada. Its source is Whitefish Lake in the Northwest Territories, and it flows east to Baker Lake in Nunavut. The Thelon ultimately drains into Hudson Bay at Chesterfield Inlet.

Weather at the gauge

Rain in the last 3 days: 2.9 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

20 Tue 0° -3° – Wind 17 km/h

21 Wed 4° 0° – Wind 18 km/h

22 Thu 2° -3° – Wind 18 km/h

23 Fri -1° -7° – Wind 14 km/h

24 Sat -5° -9° 0.2 mm Wind 20 km/h

25 Sun -5° -8° 0.1 mm Wind 20 km/h

26 Mon -1° -6° 0.5 mm Wind 18 km/h

Forecast: Open-Meteo

Sunrise 08:03 AM Sunset 05:27 PM Daylight 9 hr, 24 min Waxing gibbous 75%

Map

Questions and answers

What is a normal level for the Thelon River at the Outlet of Double Barrel Lake in mid-October?

The median for mid-October is 126 m³/s. In 8 years out of 10 the reading falls between 56.9 m³/s and 259 m³/s, based on 7 years of records.

What is the water level of Thelon River at the Outlet of Double Barrel Lake today?

On Oct 20, 2026, 11:15 PM CST, the flow was 154 m³/s. Down 10.0 m³/s over the last 24 hours.

Is Thelon River at the Outlet of Double Barrel Lake rising or falling?

Down 10.0 m³/s over the last 24 hours. Down 19.0 m³/s over the last 7 days.

Is the level of Thelon River at the Outlet of Double Barrel Lake normal?

Normal for mid-October. Compared with 7 years of daily readings for this time of year.

How often is this data updated?

Environment and Climate Change Canada – Water Survey of Canada publishes a new reading every hour. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from Environment and Climate Change Canada – Water Survey of Canada, the official operator of this gauge, and are published under the Open Government Licence – Canada. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: Environment and Climate Change Canada – Water Survey of Canada
Station code: eccc:06JA001 (Agency page)
Coordinates: 62.56758, -104.83953 (WGS84)
Vertical datum: station datum (assumed datum)
Update interval: every hour
Licence: Open Government Licence – Canada. Contains information licensed under the Open Government Licence – Canada

Published series

Parameter	Last value	Time (UTC)	Quality
Flow	154 m³/s	2026-10-21 05:15	Provisional

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How to cite

Environment and Climate Change Canada – Water Survey of Canada: Thelon River at the Outlet of Double Barrel Lake (eccc:06JA001). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/canada/northwest-territories/thelon-river-at-the-outlet-of-double-barrel-lake

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer