The Ridgeville 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.
Sunny
Partly cloudy; warmer
Mostly sunny
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Sunny
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3.40 inches of rain fell in two days, the most for this week of the year since records began in 1953. The next wettest, 2.24 inches, fell in 1989.
Ridgeville’s center stands about 710 ft above sea level. Within three miles the land runs from 540 ft to 1,040 ft, a difference of 500 ft: hilly country. The highest named summit within 15 miles is Chandler Mountain, about 1,500 ft, 15 miles southwest.
Under the town center the state geologic map shows Knox Group undifferentiated (dolostone, limestone), from the Cambrian to Ordovician, 445 to 542 million years old.
The section below crosses 12 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 21×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Dolostone, limestone. Age: Cambrian to Ordovician, 445 to 542 million years old. About 12 mi of the line.
Sandstone, conglomerate. Age: Carboniferous, 299 to 324 million years old. About 4 mi of the line.
Sandstone. Age: Silurian, 422 to 445 million years old. About 3 mi of the line.
Limestone. Age: Ordovician, 445 to 487 million years old. About 1 mi of the line.
Shale, limestone. Age: Ordovician, 445 to 487 million years old. About 0.7 mi of the line.
Sandstone. Age: Carboniferous, 324 to 359 million years old. About 0.7 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 6 smaller units along the line are not listed.
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 Ridgeville reaches Mobile Bay and the Gulf of America by way of Big Wills Creek, the Coosa, the Alabama and the Mobile: about 550 river miles.
Lake on the way: Lay Lake.
310 miles of the trip are on the Alabama.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Ridgeville; river miles along the main stem, rounded.
Ridgeville has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 33° in January. About 58 inches of rain fall in a normal year.
On November 14 Ridgeville normally reaches 64° and falls to 41°. The record high is 81°, in 1955; the record low 24°, in 1953. The most rain on this date, 2.23 in, fell in 1957.
Normals 1991–2020 and records since 1953 at Gadsden, 7 miles east-southeast, 140 ft lower. NOAA, through RCC-ACIS.
