The Pelham 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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4.65 inches of rain fell in two days, the most for this week of the year since records began in 1889. The next wettest, 4.25 inches, fell in 1997.
Pelham’s center stands about 360 ft above sea level. Within three miles the land runs from 220 ft to 370 ft, a difference of 150 ft: gently rolling country.
Under the town center the state geologic map shows Miccosukee Formation (clay, sand, gravel), from the Tertiary Neogene, 2.6 to 23 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.
Clay, sand, gravel. Age: Tertiary Neogene, 2.6 to 23 million years old. About 14 mi of the line.
Limestone. Age: Eocene, 34 to 56 million years old. About 5 mi of the line.
Dolostone, sand, clay. Age: Miocene, 5.3 to 23 million years old. About 3 mi of the line.
Limestone. Age: Oligocene, 23 to 34 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 Pelham reaches the Gulf of America by way of Big Creek, the Little Ochlockonee and the Ochlockonee: about 170 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Pelham; river miles along the main stem, rounded.
Pelham has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 38° in January. About 52 inches of rain fall in a normal year.
On November 14 Pelham normally reaches 70° and falls to 45°. The record high is 88°, in 1988; the record low 28°, in 1968. The most rain on this date, 1.18 in, fell in 1972.
Normals 1991–2020 and records since 1889 at Camilla 3 SE, 6 miles north-northwest, 160 ft lower. NOAA, through RCC-ACIS.
