The Twin 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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3.02 inches of rain fell in two days, the most for this week of the year since records began in 1923. The next wettest, 3.00 inches, fell in 2014.
Twin’s center stands about 570 ft above sea level. Within three miles the land runs from 500 ft to 830 ft, a difference of 330 ft: rolling country. The highest named summit within 15 miles is Bee Mountain, about 880 ft, 8 miles north.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 41×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand, clay. Age: Cretaceous, 66 to 145 million years old. About 10 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 8 mi of the line.
Sandstone. Age: Carboniferous, 299 to 324 million years old. About 5 mi of the line.
Sand, clay. Age: Cretaceous, 66 to 145 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.
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 Twin reaches Mobile Bay and the Gulf of America by way of Luxapallila Creek, the Tombigbee and the Mobile: about 410 river miles.
290 miles of the trip are on the Tombigbee.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Twin; river miles along the main stem, rounded.
Twin has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 30° in January. About 64 inches of rain fall in a normal year.
On November 14 Twin normally reaches 64° and falls to 39°. The record high is 80°, in 1985; the record low 20°, in 2019. The most rain on this date, 2.95 in, fell in 2024.
Normals 1991–2020 and records since 1923 at Winfield 2 SW, 7 miles south. NOAA, through RCC-ACIS.
