The Henry 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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3.86 inches of rain fell in two days, the most for this week of the year since records began in 1949. The next wettest, 3.25 inches, fell in 2015.
Henry’s center stands about 550 ft above sea level. Within three miles the land runs from 440 ft to 620 ft, a difference of 180 ft: gently rolling country.
Under the town center the state geologic map shows Claiborne and Wilcox Formation (sand), from the Tertiary, 2.6 to 66 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 64×. 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. Age: Tertiary, 2.6 to 66 million years old. About 14 mi of the line.
Silt. Age: Quaternary, less than 2.6 million years old. About 6 mi of the line.
Clay. Age: Tertiary, 2.6 to 66 million years old. About 4 mi of the line.
Fine-detrital, coarse-detrital. Age: Quaternary, less than 2.6 million years old. About 0.6 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 Henry reaches the Gulf of America by way of Guins Creek, Crooked Creek, the South Fork Obion, the Obion and the Mississippi: about 960 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Henry; river miles along the main stem, rounded.
Henry has a humid subtropical climate. Summer afternoons average 89° in July; winter nights fall to about 28° in January. About 56 inches of rain fall in a normal year, with about 3 inches of snow.
On November 14 Henry normally reaches 60° and falls to 38°. The record high is 81°, in 1985; the record low 13°, in 2019. The most rain on this date, 2.35 in, fell in 1957.
Normals 1991–2020 and records since 1949 at Huntingdon Water Plant, 14 miles south, 130 ft lower. NOAA, through RCC-ACIS.
