Flat River at The Mouth
Water level and flow at gauge 10EA003, Northwest Territories. The flow is well below normal for October (38% of the median). In the last 24 hours it has been falling.
Latest reading Oct 25, 5 AM local standard time (2 hours ago) · data checked · we check every 30 minutes
Compared with a normal October
Normal for October (middle half of 59 years of monthly averages): 48.2 m³/s1,702 cfs – 73.1 m³/s2,583 cfs, median 59.1 m³/s2,087 cfs. Right now it is at 38% of the median.
June 21, 1999 · approved records 1961–2024 (HYDAT). Right now the flow is 2% 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 56 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
| South Nahanni RiverAbove Virginia Falls · 24 km | 2.12 m6.96 ft | Below normal |
| Prairie CreekCadillac Mine - Site Two · 32 km | 1.44 m4.73 ft | Very high |
| Tetcela RiverCanadian Zinc Road · 90 km | 7.55 m24.77 ft | No normal yet |
| Grainger RiverCanadian Zinc Road · 109 km | 8.17 m26.80 ft | Very low |
| South Nahanni RiverLiard River Confluence · 120 km | 91.28 m299.47 ft | No normal yet |
| Blackstone RiverHighway No. 7 · 144 km | 3.36 m11.01 ft | Very low |
About this gauge
Station: 10EA003 · Flat River Near the Mouth
Location: 61.5300, -125.4108 · 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 Flat River at The Mouth today?
The latest reading (Oct 25, 5 AM, local standard time) is 0.81 m (2.66 ft) with a flow of 22.3 m³/s (788 cfs).
Is the Flat River at The Mouth high right now?
The flow is well below normal for October (38% of the median).
Is the Flat River rising or falling?
In the last 24 hours it has been falling.
What is the highest flow ever recorded on the Flat River at The Mouth?
1,460 m³/s (51,559 cfs) on June 21, 1999, the highest instantaneous flow in the approved records of the Water Survey of Canada (1961–2024). Events after 2024 are not yet in the approved archive.
Where does this data come from?
Gauge 10EA003 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.