The Wisacky 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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86° on Nov. 16, 1993, the hottest reading for this week of the year since 1933. Next is 85° in 1955.
Wisacky’s center stands about 190 ft above sea level. Within three miles the land runs from 150 ft to 210 ft, a difference of 60 ft: nearly flat ground. The highest named summit within 15 miles is Spring Hill, about 460 ft, 14 miles west.
Under the town center the state geologic map shows Duplin Formation (sand, clay), from the Pliocene, 2.6 to 5.3 million years old.
The section below crosses 3 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: Pliocene, 2.6 to 5.3 million years old. About 9 mi of the line.
Sand, limestone. Age: Tertiary, 2.6 to 66 million years old. About 9 mi of the line.
Clay, sand. Age: Late Cretaceous, 66 to 72 million years old. About 7 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 Wisacky reaches the Atlantic Ocean by way of the Lynches, Clark Creek, the Great Pee Dee, Schooner Creek and the Waccamaw: about 150 river miles.
90 miles of the trip are on the Lynches.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Wisacky; river miles along the main stem, rounded.
Wisacky has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 33° in January. About 47 inches of rain fall in a normal year.
On November 14 Wisacky normally reaches 67° and falls to 40°. The record high is 81°, in 1989; the record low 22°, in 2013. The most rain on this date, 0.98 in, fell in 2016.
Normals 1991–2020 and records since 1933 at Bishopville 1.4 ENE, 6 miles north-northwest. NOAA, through RCC-ACIS.
