Prelude Lake

Normal

Water level is right where you'd expect for mid-September and holding steady.

Low (168.83m)Normal rangeHigh (169.58m)

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

-1.3 cm over 7 days

Seasonal Position

27th percentile

Based on 30 years of records

Seasonal Outlook

Typical next 7 days

This lake usually holds steady 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 30 years of seasonal patterns. This is a historical seasonal pattern, not a forecast.

Lake Profile

Est. average depth20.8 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: 169.09 m
Reference value: 169.09 m (rolling_6h_mean)
Percentile for date: 27th percentile
Years of record: 30
Source station: PRELUDE LAKE NEAR YELLOWKNIFE (07SB017)
Est. average depth: 20.8 m
Relationship type: direct_lake
Mapping confidence: medium
Today's normal range: 169.08–169.28 m
Same-date historical range: 168.83–169.58 m
30-day change: -3.5 cm
Data confidence: medium
Observed at: Sep 20, 2026
Last snapshot: Sep 20, 2026

Data source: ECCC Water Office — Station 07SB017. Water level readings are provisional and subject to revision. This is not a navigation or flood-warning service.