The Brook Highland 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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18° on Nov. 13, 2019, the coldest reading for this week of the year since 1895. Next is 19° in 1940.
Brook Highland’s center stands about 630 ft above sea level. Within three miles the land runs from 470 ft to 1,110 ft, a difference of 640 ft: hilly country. The highest named summit within 15 miles is Signal Mountain, about 1,560 ft, 6 miles east-southeast.
The section below crosses 10 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 20×. 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, siltstone. Age: Carboniferous, 299 to 324 million years old. About 9 mi of the line.
Shale, siltstone, sandstone. Age: Carboniferous, 299 to 324 million years old. About 5 mi of the line.
Shale. Age: Carboniferous, 324 to 359 million years old. About 4 mi of the line.
Shale. Age: Carboniferous, 324 to 359 million years old. About 3 mi of the line.
Shale. Age: Carboniferous, 299 to 324 million years old. About 0.7 mi of the line.
Limestone, dolostone. Age: Ordovician, 445 to 487 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. 4 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 Brook Highland reaches Mobile Bay and the Gulf of America by way of the Little Cahaba, the Cahaba, the Alabama and the Mobile: about 400 river miles.
200 miles of the trip are on the Alabama.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Brook Highland; river miles along the main stem, rounded.
Brook Highland has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 35° in January. About 57 inches of rain fall in a normal year, with about 1 inch of snow.
On November 14 Brook Highland normally reaches 65° and falls to 43°. The record high is 82°, in 1955; the record low 23°, in 2014. The most rain on this date, 4.43 in, fell in 1929.
Normals 1991–2020 and records since 1895 from the Birmingham Area threaded record (Birmingham Airport, 10 miles north-northwest). NOAA, through RCC-ACIS.
