The Smithland 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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3.50 inches of rain fell in two days, the most for this week of the year since records began in 1980. The next wettest, 3.44 inches, fell in 2011.
Smithland’s center stands about 340 ft above sea level. Within three miles the land runs from 290 ft to 520 ft, a difference of 230 ft: rolling country. The highest named summit within 15 miles is Eberle Knobs, about 680 ft, 13 miles northeast.
Under the town center the state geologic map shows Alluvium (sand, silt), from the Pleistocene to Holocene, less than 2.6 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 56×. 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, sandstone. Age: Carboniferous, 324 to 359 million years old. About 10 mi of the line.
Sand, silt. Age: Pleistocene to Holocene, less than 2.6 million years old. About 9 mi of the line.
Fine-detrital. Age: Tertiary to Holocene, less than 66 million years old. About 3 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 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 Smithland reaches the Gulf of America by way of the Ohio and the Mississippi: about 1,030 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Smithland; river miles along the main stem, rounded.
Smithland has a humid subtropical climate. Summer afternoons average 88° in July; winter nights fall to about 26° in January. About 49 inches of rain fall in a normal year, with about 4 inches of snow.
On November 14 Smithland normally reaches 58° and falls to 37°. The record high is 77°, in 1999; the record low 13°, in 1986. The most rain on this date, 1.47 in, fell in 2024.
Normals 1991–2020 and records since 1980 at Smithland Lock & Dam, 2 miles northwest. NOAA, through RCC-ACIS.
