Prosperous Lake

Lower than usual

Water level is a bit below the typical range for mid-September and holding steady.

Low (157.65m)Normal rangeHigh (159.20m)

Current Weather

2d ago

14°CPartly Cloudy

Wind SSE 19 km/h

Humidity 71%

Mainly sunny

Environment Canada — Yellowknife Region

vs. Last Year

No data available

7-Day Trend

→Stable

Changed less than 2.0 cm over the past week

-0.5 cm over 7 days

Seasonal Position

18th percentile

Based on 38 years of records

Seasonal Outlook

Typical next 7 days

This lake usually drops slightly over the next week.

Typical next 14 days

Over two weeks, levels typically drops slightly.

Tracking

This year is tracking near the seasonal norm.

Based on 38 years of seasonal patterns. This is a historical seasonal pattern, not a forecast.

Lake Profile

Est. average depth24.4 m

Estimated from HydroLAKES v1.0 (Messager et al., 2016). Modeled geo-statistical estimate, not a direct survey measurement.

Water Level — Last 30 Days

Technical details

Current level: 158.14 m
Reference value: 158.13 m (rolling_6h_mean)
Percentile for date: 18th percentile
Years of record: 38
Source station: PROSPEROUS LAKE NEAR MCMEEKAN BAY (07SB014)
Est. average depth: 24.4 m
Relationship type: direct_lake
Mapping confidence: medium
Today's normal range: 158.21–158.65 m
Same-date historical range: 157.65–159.20 m
30-day change: +1.6 cm
Data confidence: medium
Observed at: Sep 20, 2026
Last snapshot: Sep 20, 2026

Data source: ECCC Water Office — Station 07SB014. Water level readings are provisional and subject to revision. This is not a navigation or flood-warning service.