The Norwalk 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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78° on Nov. 11, 2020, the hottest reading for this week of the year since 1894. Next is 76° in 1909.
Norwalk’s center stands about 730 ft above sea level. Within three miles the land runs from 650 ft to 870 ft, a difference of 220 ft: rolling country.
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 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 44×. 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 10 mi of the line.
Sandstone, shale. Age: Devonian, 359 to 422 million years old. About 7 mi of the line.
Shale, siltstone, sandstone. Age: Devonian to Carboniferous, 324 to 422 million years old. About 4 mi of the line.
Shale, limestone. Age: Devonian, 359 to 422 million years old. About 2 mi of the line.
Limestone. Age: Devonian, 359 to 422 million years old. About 0.5 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 Norwalk reaches Lake Erie by way of Norwalk Creek, the East Branch Huron and the Huron: about 20 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 Norwalk; river miles along the main stem, rounded.
Norwalk has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 19° in January. A normal year brings about 33 inches of snow; with the rain, that comes to about 40 inches of water.
On November 14 Norwalk normally reaches 50° and falls to 34°. The record high is 76°, in 1909; the record low 10°, in 2019. The most rain on this date, 2.35 in, fell in 1955.
Normals 1991–2020 and records since 1894 at Norwalk Wwtp, here. NOAA, through RCC-ACIS.
