The Somerset 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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4° on Nov. 13, 2019, the coldest reading for this week of the year since 1944. Next is 8° in 1959.
Somerset’s center stands about 1,070 ft above sea level. Within three miles the land runs from 990 ft to 1,140 ft, a difference of 150 ft: gently rolling country. The highest named summit within 15 miles is Prospect Hill, about 1,230 ft, 6 miles east.
Under the town center the state geologic map shows Marshall Sandstone, from the Carboniferous, 324 to 359 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 60×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone. Age: Carboniferous, 324 to 359 million years old. About 22 mi of the line.
Shale. Age: Carboniferous, 324 to 359 million years old. About 2 mi of the line.
Shale. Age: Carboniferous, 324 to 359 million years old. About 0.4 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 Somerset reaches Lake Erie by way of Goose Creek and the River Raisin: about 140 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 Somerset; river miles along the main stem, rounded.
Somerset has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 17° in January. About 32 inches of rain fall in a normal year.
On November 14 Somerset normally reaches 48° and falls to 33°. The record high is 67°, in 1956; the record low 12°, in 1986. The most rain on this date, 1.01 in, fell in 1957.
Normals 1991–2020 and records since 1944 at Jackson Reynolds Field, 15 miles north-northwest. NOAA, through RCC-ACIS.
