Thelon River at The Outlet of Double Barrel Lake
Water level and flow at gauge 06JA001, Northwest Territories. The flow is normal for October (94% of the median). In the last 24 hours it has been falling.
Latest reading Oct 25, 7 AM local standard time (about an hour ago) · data checked · we check every 30 minutes
Compared with a normal October
Normal for October (middle half of 6 years of monthly averages): 90.2 m³/s3,185 cfs – 183 m³/s6,445 cfs, median 128 m³/s4,503 cfs. Right now it is at 94% of the median.
June 11, 2021 · approved records 2020–2022 (HYDAT). Right now the flow is 11% of that record.
Last 30 days
Hourly readings · shaded: normal range for this month
This year compared with past years
Daily flow
Normal range: monthly averages of 5 years (lighter band: 10th–90th percentile). Past years: approved daily means from HYDAT, the Water Survey of Canada archive (the latest year published is 2025). 2026: daily means of the provisional real-time readings collected by Canada River Levels since October 22, 2026.
Nearby gauges
| Hanbury RiverAbove Hoare Lake · 115 km | 4.66 m15.30 ft | Normal |
| Dubawnt RiverAbove Dubawnt Lake · 136 km | 9.92 m32.54 ft | Normal |
| Lockhart RiverOutlet of Artillery Lake · 188 km | 1.86 m6.10 ft | Normal |
| Hoarfrost RiverThe Mouth · 227 km | 7.84 m25.73 ft | Normal |
| Ennadai LakeEnnadai · 257 km | 312.60 m1,025.60 ft | Above normal |
| Nonacho LakeLutselk'E · 267 km | 6.36 m20.87 ft | Normal |
About this gauge
Station: 06JA001 · Thelon River at the Outlet of Double Barrel Lake
Location: 62.5676, -104.8395 · Northwest Territories
Water levels are measured from a local reference point at each gauge, not from sea level, so they cannot be compared between gauges.
Official sources
For flood warnings, advisories and approved data, always use these official services:
Questions
What is the water level of the Thelon River at The Outlet of Double Barrel Lake today?
The latest reading (Oct 25, 7 AM, local standard time) is — with a flow of 120 m³/s (4,238 cfs).
Is the Thelon River at The Outlet of Double Barrel Lake high right now?
The flow is normal for October (94% of the median).
Is the Thelon River rising or falling?
In the last 24 hours it has been falling.
What is the highest flow ever recorded on the Thelon River at The Outlet of Double Barrel Lake?
1,110 m³/s (39,199 cfs) on June 11, 2021, the highest instantaneous flow in the approved records of the Water Survey of Canada (2020–2022). Events after 2022 are not yet in the approved archive.
Where does this data come from?
Gauge 06JA001 of the Water Survey of Canada (Environment and Climate Change Canada). Real-time data are provisional and may be revised. We check for new readings every 30 minutes. Canada River Levels is not an official source.