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.
Chance of showers
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Mostly cloudy
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74° on Nov. 11, 2020, the hottest reading for this week of the year since 1956. Next is 69° in 2012.
Andover’s center stands about 1,660 ft above sea level. Within three miles the land runs from 1,600 ft to 2,280 ft, a difference of 680 ft: hilly country. The highest named summit within 15 miles is Alma Hill, about 2,570 ft, 13 miles southwest.
Under the town center the state geologic map shows Conneaut Group, undivided (shale, sandstone), from the Late Devonian, 359 to 384 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 19×. 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, sandstone. Age: Late Devonian, 359 to 384 million years old. About 17 mi of the line.
Shale, siltstone, sandstone. Age: Late Devonian, 359 to 384 million years old. About 5 mi of the line.
Shale. Age: Late Devonian, 359 to 384 million years old. About 3 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 Lake Ontario by way of East Valley Creek, Dyke Creek and the Genesee: about 150 river miles. From the lake it goes down the St. Lawrence to the Atlantic.
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 79° in July; winter nights fall to about 13° in January. A normal year brings about 54 inches of snow; with the rain, that comes to about 40 inches of water.
Normals 1991–2020 and records since 1956 at Wellsville, 8 miles west-southwest, 150 ft lower. NOAA, through RCC-ACIS.
