Yellowknife River at Inlet To Prosperous Lake
Water level and flow at gauge 07SB003, Northwest Territories. The flow is below normal for October (60% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 6 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 77 years of monthly averages): 20.2 m³/s713 cfs – 42.0 m³/s1,483 cfs, median 25.5 m³/s901 cfs. Right now it is at 60% of the median.
July 1, 1991 · approved records 1988–2024 (HYDAT). Right now the flow is 8% 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 76 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.
Weather near this gauge
A mix of sun and cloud. Clearing late this afternoon. Wind becoming south 20 km/h gusting to 40 near noon. High plus 2. Wind chill minus 13 this morning.
Clear. Becoming partly cloudy this evening. Wind south 20 km/h gusting to 40. Low minus 1.
Sunny. Wind southwest 20 km/h gusting to 40 becoming light in the afternoon. High plus 1. Wind chill minus 7 in the morning. UV index 1 or low.
Clear. Low minus 7.
Forecast for Yellowknife (25 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Bluefish LakeYellowknife · 1 km | 185.76 m609.44 ft | Normal |
| Yellowknife RiverOutlet of Prosperous Lake · 13 km | — | Below normal |
| Prosperous LakeMcMeekan Bay · 15 km | 158.11 m518.75 ft | Below normal |
| Yellowknife RiverAbove Quyta Lake · 17 km | 8.76 m28.75 ft | Below normal |
| Prelude LakeYellowknife · 18 km | 169.03 m554.57 ft | Below normal |
| Duncan LakeYellowknife · 19 km | 212.11 m695.89 ft | Normal |
About this gauge
Station: 07SB003 · Yellowknife River at Inlet To Prosperous Lake
Location: 62.6720, -114.2612 · Northwest Territories
Same river: Outlet of Prosperous Lake, Above Quyta Lake
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 Yellowknife River at Inlet To Prosperous Lake today?
The latest reading (Oct 25, 6 AM, local standard time) is 152.77 m (501.20 ft) with a flow of 15.2 m³/s (537 cfs).
Is the Yellowknife River at Inlet To Prosperous Lake high right now?
The flow is below normal for October (60% of the median).
Is the Yellowknife River rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Yellowknife River at Inlet To Prosperous Lake?
186 m³/s (6,569 cfs) on July 1, 1991, the highest instantaneous flow in the approved records of the Water Survey of Canada (1988–2024). Events after 2024 are not yet in the approved archive.
Where does this data come from?
Gauge 07SB003 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.