Map of St. Nora Lake with depth contours

St. Nora Lake

45.1558° N, 78.8297° W

Depth contours from the 1968 government survey. Not for navigation.

Download the depth map (SVG)

St. Nora Lake is 36.6 m deep at its deepest point, deeper than 85% of the 2,688 surveyed lakes in Ontario. It covers 2.73 km² and lies 5.8 km west of Halls Lake.

Maximum depth
36.6 msurveyed 1968
deeper than 85% of the 2,688 surveyed lakes in Ontario
Area
2.73 km²
larger than 85% of the 18,731 lakes in Ontario
Shoreline
15.7 km
longer than 84% of the 18,731 lakes in Ontario
Elevation
330 m

Today on the water

9.1 °C

Wind SSW 3 km/h

Observed at Oxtongue Lake, as of 10:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.3 m. Around 12 p.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.

Hourly forecast, next 24 hours
Time11 a.m.2 p.m.5 p.m.8 p.m.11 p.m.2 a.m.5 a.m.8 a.m.
Wind km/hW 15NW 30NW 30NW 15var. 5var. 5SE 10SE 10
Gusts km/h5050
Waves (est.) m0.10.30.30.2
Temp. °C8121382-2-3-1
Precip. %40202000000

Today: A mix of sun and cloud. 40 percent chance of showers this morning and early this afternoon. Wind becoming northwest 30 km/h gusting to 50 near noon. High 13. UV index 4 or moderate.

Weather: Oxtongue Lake (local forecast), as of 10:01 a.m. EDT

Sun and moon

Civil dawn
6:54 a.m.
Sunrise
7:23 a.m.
Sunset
6:40 p.m.
Civil dusk
7:10 p.m.
Moonrise
6:15 a.m.
Moonset
5:59 p.m.
Moon
Waning crescent, 1% lit

Air Quality Health Index

1 low risk

Dorset, as of 9:00 a.m. EDT

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

33% of St. Nora Lake is deeper than 20 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 1968 records a maximum depth of 36.6 m, drawn from 25 depth contours.

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 Depths are from government surveys and may be outdated.

Water

Total phosphorus (µg/L)

Getting on the water

1 listed boat launch; 1 with parking listed. marks launches on the map.