The Clarksville 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
Mostly sunny; warmer
Sunny
Sunny
Mostly sunny
Mostly sunny
Mostly sunny
12° on Nov. 12, 2019, the coldest reading for this week of the year since 1890. Next is 13° in 1940.
Clarksville’s center stands about 470 ft above sea level. Within three miles the land runs from 360 ft to 590 ft, a difference of 230 ft: rolling country.
Under the town center the state geologic map shows St. Louis Limestone and Warsaw Limestone, from the Carboniferous, 324 to 359 million years old.
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 49×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 14 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 4 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 3 mi of the line.
Fine-detrital, coarse-detrital. Age: Quaternary, less than 2.6 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 Clarksville reaches the Gulf of America by way of the West Fork Red, the Cumberland, the Ohio and the Mississippi: about 1,160 river miles.
Lake on the way: Bards Lake.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Clarksville; river miles along the main stem, rounded.
Clarksville has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 28° in January. About 54 inches of rain fall in a normal year.
On November 14 Clarksville normally reaches 60° and falls to 37°. The record high is 80°, in 1978; the record low 15°, in 1986. The most rain on this date, 2.24 in, fell in 1957.
Normals 1991–2020 and records since 1890 at Clarksville Wwtp, here. NOAA, through RCC-ACIS.
