Map of Lac Brochet with depth contours

Lac Brochet

48.9677° N, 71.9482° W

Depth contours from the 1976 government survey. Not for navigation.

Download the depth map (SVG)

Lac Brochet is 15.8 m deep at its deepest point, shallower than 53% of the 1,506 surveyed lakes in Quebec. It covers 3.05 km² and lies 8.2 km northeast of Sainte-Élisabeth-de-Proulx.

Maximum depth
15.8 msurveyed 1976
shallower than 53% of the 1,506 surveyed lakes in Quebec
Area
3.05 km²
larger than 87% of the 29,407 lakes in Quebec
Shoreline
15.1 km
longer than 84% of the 29,407 lakes in Quebec
Water clarity
2 mSecchi depth, 2011
less clear than 87% of the 805 monitored lakes in Quebec
Elevation
184 m

Today on the water

2.5 °C

Wind WSW 18 km/h

Observed at Dolbeau-Mistassini, as of 6:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 7 a.m., wind from the west: the west shore is sheltered, waves build toward the east shore.

Hourly forecast, next 24 hours
Time7 a.m.10 a.m.1 p.m.4 p.m.7 p.m.10 p.m.1 a.m.4 a.m.
Wind km/hW 20W 20W 20W 20W 20W 20W 20W 20
Gusts km/h4040404040404040
Waves (est.) m0.20.20.20.20.2
Temp. °C67785434
Precip. %4040404030303030

Today: Mainly cloudy with 40 percent chance of showers. Wind west 20 km/h gusting to 40. High 8. UV index 3 or moderate.

Weather: Dolbeau-Mistassini (local forecast), as of 6:03 a.m. EDT

Sun and moon

Civil dawn
6:27 a.m.
Sunrise
6:59 a.m.
Sunset
6:09 p.m.
Civil dusk
6:41 p.m.
Moonrise
5:48 a.m.
Moonset
5:27 p.m.
Moon
Waning crescent, 1% lit

Data Source: Environment and Climate Change Canada. Local times.

How waves are estimated

Significant wave height from the forecast hourly wind and the open-water distance (fetch) upwind, using the SMB method (US Army Corps of Engineers Shore Protection Manual, 1984), rounded up to the next 0.1 m. It is not a measurement: gusts, leftover swell and shoals can make water rougher. Under 0.2 m: calm; 0.2–0.5 m: choppy; over 0.5 m: rough.

Depth

51% of Lac Brochet is deeper than 5 m.

How to read it: the lake’s area is sorted from the shore to the deepest point. Where the curve is flat, large areas share one depth (flats and weed beds); where it drops, depth changes quickly (drop-offs).

The government depth survey from 1976 records a maximum depth of 15.8 m, drawn from 13 depth contours.

Not for navigation. Depths are from government surveys and may be outdated.

Water

Trophic status from the latest monitoring: eutrophic.

Clarity was measured with a Secchi disk in 6 years between 2006 and 2011; the latest annual mean is 2 m.

Water clarity (Secchi depth, m)