Thlewiaza River above Outlet Sealhole Lake
Water level and flow at gauge 06HB002, Nunavut. The flow is normal for October (104% of the median). In the last 24 hours it has been falling.
Latest reading Oct 25, 6 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 43 years of monthly averages): 211 m³/s7,434 cfs – 300 m³/s10,594 cfs, median 258 m³/s9,111 cfs. Right now it is at 104% of the median.
September 29, 1995 · approved records 1981–2024 (HYDAT). Right now the flow is 43% 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 43 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
| Ennadai LakeEnnadai · 127 km | 312.61 m1,025.61 ft | Above normal |
| Seal RiverBelow Great Island · 253 km | 121.43 m398.40 ft | Normal |
| Dubawnt RiverAbove Dubawnt Lake · 294 km | 9.92 m32.53 ft | Normal |
| Cochrane RiverBrochet · 343 km | 29.26 m95.99 ft | Normal |
| Kazan RiverAbove Kazan Falls · 353 km | 75.07 m246.30 ft | Very high |
| Wollaston LakeRoss Channel · 360 km | 391.48 m1,284.38 ft | Above normal |
About this gauge
Station: 06HB002 · Thlewiaza River Above Outlet Sealhole Lake
Location: 60.7865, -98.7769 · Nunavut
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 Thlewiaza River above Outlet Sealhole Lake today?
The latest reading (Oct 25, 6 AM, local standard time) is 25.93 m (85.06 ft) with a flow of 269 m³/s (9,500 cfs).
Is the Thlewiaza River above Outlet Sealhole Lake high right now?
The flow is normal for October (104% of the median).
Is the Thlewiaza River rising or falling?
In the last 24 hours it has been falling.
What is the highest flow ever recorded on the Thlewiaza River above Outlet Sealhole Lake?
628 m³/s (22,178 cfs) on September 29, 1995, the highest instantaneous flow in the approved records of the Water Survey of Canada (1981–2024). Events after 2024 are not yet in the approved archive.
Where does this data come from?
Gauge 06HB002 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.