The Southaven 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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85° on Nov. 13, 1955, the hottest reading for this week of the year since 1872. Next is 84° in 1958.
Southaven’s center stands about 330 ft above sea level. Within three miles the land runs from 250 ft to 400 ft, a difference of 150 ft: gently rolling country.
Under the town center the state geologic map shows Kosciusko formation (sand, clay), from the Eocene, 34 to 56 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, clay. Age: Eocene, 34 to 56 million years old. About 13 mi of the line.
Silt. Age: Quaternary, less than 2.6 million years old. About 6 mi of the line.
Fine-detrital, coarse-detrital. Age: Quaternary, less than 2.6 million years old. About 3 mi of the line.
Coarse-detrital, fine-detrital. Age: Holocene, less than 12,000 years old. About 1 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 Southaven reaches the Gulf of America by way of Horn Lake Creek and the Mississippi: about 750 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Southaven; river miles along the main stem, rounded.
Southaven has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 33° in January. About 55 inches of rain fall in a normal year, with about 3 inches of snow.
On November 14 Southaven normally reaches 63° and falls to 43°. The record high is 81°, in 1999; the record low 20°, in 1940. The most rain on this date, 3.17 in, fell in 1915.
Normals 1991–2020 and records since 1872 from the Memphis Area threaded record (Memphis International Airport, 5 miles north-northeast). NOAA, through RCC-ACIS.
