The Andover 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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77° on Nov. 13, 1949, the hottest reading for this week of the year since 1931. Next is 77° in 2020.
Andover’s center stands about 1,080 ft above sea level. Within three miles the land runs from 990 ft to 1,200 ft, a difference of 210 ft: rolling country.
Under the town center the state geologic map shows Berea Sandstone and Bedford Shale, Undivided (sandstone, 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 43×. 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, shale. Age: Devonian, 359 to 422 million years old. About 8 mi of the line.
Shale. Age: Late Devonian, 359 to 384 million years old. About 8 mi of the line.
Shale, black-shale. Age: Devonian, 359 to 422 million years old. About 7 mi of the line.
Siltstone, shale. Age: Carboniferous, 324 to 359 million years old. About 2 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 Andover reaches the Gulf of America by way of the Pymatuning Swamp (historical), the Shenango, the Beaver, the Ohio and the Mississippi: about 2,020 river miles.
Lake on the way: Pymatuning Swamp (historical).
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Andover; river miles along the main stem, rounded.
Andover has a warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 16° in January. A normal year brings about 62 inches of snow; with the rain, that comes to about 44 inches of water.
On November 14 Andover normally reaches 50° and falls to 32°. The record high is 70°, in 1989; the record low 13°, in 1933. The most rain on this date, 1.22 in, fell in 1972.
Normals 1991–2020 and records since 1931 at Jamestown 2 NW, 9 miles southeast. NOAA, through RCC-ACIS.
