The Choccolocco 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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4.61 inches of rain fell in two days, the most for this week of the year since records began in 1903. The next wettest, 4.01 inches, fell in 2018.
Choccolocco’s center stands about 680 ft above sea level. Within three miles the land runs from 640 ft to 1,890 ft, a difference of 1,250 ft: steep hill country. The highest named summit within 15 miles is Cheaha Mountain, about 2,420 ft, 13 miles south-southwest.
Under the town center the state geologic map shows Rome Formation (mudstone, shale, siltstone), from the Cambrian, 487 to 542 million years old.
The section below crosses 13 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 14×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Mudstone, shale, siltstone. Age: Cambrian, 487 to 542 million years old. About 5 mi of the line.
Phyllite, metaclastic. Age: Silurian to Devonian, 359 to 445 million years old. About 3 mi of the line.
Arkose, conglomerate-sandstone, mudstone. Age: Cambrian, 487 to 542 million years old. About 3 mi of the line.
Shale, mudstone. Age: Carboniferous, 324 to 359 million years old. About 2 mi of the line.
Metasiltstone. Age: Cambrian, 487 to 542 million years old. About 2 mi of the line.
Dolostone. Age: Cambrian, 487 to 542 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. 7 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 Choccolocco reaches Mobile Bay and the Gulf of America by way of Choccolocco Creek, the Coosa, the Alabama and the Mobile: about 520 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 Choccolocco; river miles along the main stem, rounded.
Choccolocco has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 34° in January. About 52 inches of rain fall in a normal year.
On November 14 Choccolocco normally reaches 66° and falls to 41°. The record high is 81°, in 1955; the record low 22°, in 1904. The most rain on this date, 1.12 in, fell in 1957.
Normals 1991–2020 and records since 1903 at Anniston Metropolitan Airport, 10 miles west-southwest. NOAA, through RCC-ACIS.
