The Mentor plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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Mostly cloudy; warmer
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74° on Nov. 11, 2022, the hottest reading for this week of the year since 1891. Next is 69° in 2012.
Mentor’s center stands about 870 ft above sea level. Within three miles the land runs from 690 ft to 1,090 ft, a difference of 400 ft: hilly country. The highest named summit within 15 miles is Watson Hills, about 1,500 ft, 13 miles south-southwest.
Under the town center the state geologic map shows Traverse Group (limestone), from the Middle Devonian, 384 to 394 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 21×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone. Age: Middle Devonian, 384 to 394 million years old. About 17 mi of the line.
Black-shale. Age: Late Devonian, 359 to 384 million years old. About 7 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Mentor reaches Lake Huron by way of Crooked Lake, the Crooked River, the Indian and the Cheboygan: about 50 river miles. From there it moves on through the Great Lakes, over Niagara Falls and down the St. Lawrence to the Atlantic.
Lakes on the way: Burt Lake, Mullett Lake and Crooked Lake.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Mentor; river miles along the main stem, rounded.
Mentor has a warm-summer humid continental climate. Summer afternoons average 75° in July; winter nights fall to about 14° in February. A normal year brings about 124 inches of snow; with the rain, that comes to about 34 inches of water.
On November 14 Mentor normally reaches 44° and falls to 32°. The record high is 63°, in 1999; the record low 13°, in 1933. The most rain on this date, 0.84 in, fell in 1957.
Normals 1991–2020 and records since 1891 at Petoskey, 15 miles west-northwest, 270 ft lower. NOAA, through RCC-ACIS.
