Yellowknife River at Inlet to Prosperous Lake water level

Name: Yellowknife River at Inlet to Prosperous 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, Yellowknife River, Northwest Territories, Canada

Directions

Normal for mid-October

Surface elevation

152.77m Up 0.05 m over the last 24 hours

Measured Oct 20, 2026, 12:35 PM MDT (1 hour ago)

Flow: 15.2 m³/s

History

7 days 30 days

Surface elevation Normal range (10–90 %)

What this means

The Yellowknife River at Inlet to Prosperous Lake is at 152.77 m, in the normal range for mid-October.

The median for mid-October is 152.89 m, based on 20 years of readings, so the water level is 0.12 m below typical.

It has risen 0.05 m over the past 24 hours. In the last month it has stayed between 152.70 m and 152.78 m.

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

Compared with 20 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 152.89 m0.12 m below the median for this date
Normal for this date: 152.52 m – 153.49 m8 years in 10 fall in this range (20 years of records)
Lowest and highest in 30 days: 152.70 m – 152.78 m
Lowest and highest in 12 months: 152.71 m – 152.77 m

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.

Weather at the gauge

Rain in the last 3 days: 1.9 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

20 Tue 4° -3° – Wind 18 km/h

21 Wed 8° 1° – Wind 20 km/h

22 Thu 1° -3° – Wind 11 km/h

23 Fri 1° -2° – Wind 5 km/h

24 Sat 0° -4° 0.3 mm Wind 12 km/h

25 Sun 0° -7° – Wind 13 km/h

26 Mon 1° -1° 1.1 mm Wind 14 km/h

Forecast: Open-Meteo

Sunrise 08:38 AM Sunset 06:07 PM Daylight 9 hr, 29 min Waxing gibbous 71%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Bluefish Lake near YellowknifeLake, Bluefish Lake	185.80 m	Low	+0.02 m	0.8 km
Prosperous Lake near McMeekan BayLake, Prosperous Lake	158.09 m	Low	±0	15 km
Prelude Lake near YellowknifeLake, Prelude Lake	169.05 m	Normal	±0	18 km
Duncan Lake near YellowknifeLake, Duncan Lake	212.15 m	Normal	±0	19 km
Baker Creek at Outlet of Lower Martin LakeRiver gauge, Baker Creek	28.95 m	Low	±0	19 km
Great Slave Lake at Yellowknife BayLake, Great Slave Lake	156.58 m	Normal	+0.06 m	26 km
Cameron River below Reid LakeRiver gauge, Cameron River	1.85 m	Normal	+0.01 m	43 km

Questions and answers

What is a normal level for the Yellowknife River at Inlet to Prosperous Lake in mid-October?

The median for mid-October is 152.89 m. In 8 years out of 10 the reading falls between 152.52 m and 153.49 m, based on 20 years of records.

Is Yellowknife River at Inlet to Prosperous Lake really 152.77 m deep?

No. 152.77 m is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of Yellowknife River at Inlet to Prosperous Lake today?

On Oct 20, 2026, 12:35 PM MDT, the surface elevation was 152.77 m. Up 0.05 m over the last 24 hours.

Is Yellowknife River at Inlet to Prosperous Lake rising or falling?

Up 0.05 m over the last 24 hours. Up 0.07 m over the last 7 days.

Is the level of Yellowknife River at Inlet to Prosperous Lake normal?

Normal for mid-October. Compared with 20 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:07SB003 (Agency page)
Coordinates: 62.67200, -114.26122 (WGS84)
Vertical datum: MIRAMAR CON MINE 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
Surface elevation	152.77 m	2026-10-20 18:35	Provisional
Flow	15.2 m³/s	2026-10-20 18:35	Provisional

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How to cite

Environment and Climate Change Canada – Water Survey of Canada: Yellowknife River at Inlet to Prosperous Lake (eccc:07SB003). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/canada/northwest-territories/yellowknife-river-at-inlet-to-prosperous-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