The Gates Mills 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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76° on Nov. 11, 2020, the hottest reading for this week of the year since 1945. Next is 70° in 1949.
Gates Mills’s center stands about 730 ft above sea level. Within three miles the land runs from 720 ft to 1,260 ft, a difference of 540 ft: hilly country. The highest named summit within 15 miles is McConougheys Hill, about 1,370 ft, 9 miles southeast.
Under the town center the state geologic map shows Ohio Shale (shale, black-shale), from the Devonian, 359 to 422 million years old.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 27×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, black-shale. Age: Devonian, 359 to 422 million years old. About 6 mi of the line.
Sandstone, shale. Age: Devonian, 359 to 422 million years old. About 6 mi of the line.
Shale, siltstone. Age: Carboniferous, 299 to 324 million years old. About 6 mi of the line.
Shale, siltstone, sandstone. Age: Devonian to Carboniferous, 324 to 422 million years old. About 4 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 Gates Mills reaches Lake Erie by way of the Chagrin: about 16 river miles. From there it moves on through the Great Lakes, over Niagara Falls and down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Gates Mills; river miles along the main stem, rounded.
Gates Mills has a warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 17° in January. A normal year brings about 114 inches of snow; with the rain, that comes to about 51 inches of water.
On November 14 Gates Mills normally reaches 49° and falls to 32°. The record high is 70°, in 1989; the record low 12°, in 1986. The most rain on this date, 1.20 in, fell in 1972.
Normals 1991–2020 and records since 1945 at Chardon, 12 miles east-northeast, 400 ft higher. NOAA, through RCC-ACIS.
