The Carrollton 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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Mostly sunny; warmer
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4.84 inches of rain fell in two days, the most for this week of the year since records began in 1904. The next wettest, 4.00 inches, fell in 2009.
Carrollton’s center stands about 1,070 ft above sea level. Within three miles the land runs from 990 ft to 1,210 ft, a difference of 220 ft: rolling country. The highest named summit within 15 miles is Blackjack Mountain, about 1,580 ft, 15 miles southwest.
Under the town center the state geologic map shows Garnet Mica Schist (mica-schist), from the Precambrian to Paleozoic.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 24×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Mica-schist. Age: Precambrian to Paleozoic. About 10 mi of the line.
Mica-schist, gneiss. Age: Precambrian to Paleozoic. About 4 mi of the line.
Gneiss. Age: Precambrian to Paleozoic. About 4 mi of the line.
Schist. Age: Precambrian to Paleozoic. About 2 mi of the line.
Granite. Age: Precambrian to Paleozoic. About 2 mi of the line.
Hornblende-gneiss, amphibolite. Age: Precambrian to Paleozoic. 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. 2 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 Carrollton reaches Mobile Bay and the Gulf of America by way of the Little Tallapoosa, the Tallapoosa, the Alabama and the Mobile: about 580 river miles.
310 miles of the trip are on the Alabama.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Carrollton; river miles along the main stem, rounded.
Carrollton has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 32° in January. About 54 inches of rain fall in a normal year.
On November 14 Carrollton normally reaches 64° and falls to 39°. The record high is 80°, in 1955; the record low 20°, in 2019. The most rain on this date, 1.71 in, fell in 1972.
Normals 1991–2020 and records since 1904 at Carrollton, here. NOAA, through RCC-ACIS.
