The Atco 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.
Mostly cloudy
Partly cloudy
Mostly sunny
Sunny
Sunny
Mostly sunny
Mostly sunny
81° on Nov. 15, 1993, the hottest reading for this week of the year since 1864. Next is 78° in 1990.
Atco’s center stands about 160 ft above sea level. Within three miles the land runs from 100 ft to 200 ft, a difference of 100 ft: gently rolling country.
Under the town center the state geologic map shows Cohansey Formation (sand), from the Middle Miocene, 12 to 14 million years old.
The section below crosses 5 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: Middle Miocene, 12 to 14 million years old. About 17 mi of the line.
Clay, sand. Age: Early Miocene, 16 to 23 million years old. About 4 mi of the line.
Sand. Age: Late Cretaceous, 66 to 72 million years old. About 1 mi of the line.
Sand. Age: Late Cretaceous, 72 to 84 million years old. About 0.8 mi of the line.
Sand. Age: Late Cretaceous, 72 to 84 million years old. About 0.4 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 Atco reaches the Atlantic Ocean by way of the Mullica: about 40 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Atco; river miles along the main stem, rounded.
Atco 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.
On November 14 Atco normally reaches 57° and falls to 38°. The record high is 75°, in 1993; the record low 18°, in 1986. The most rain on this date, 0.93 in, fell in 1972.
Normals 1991–2020 and records since 1864 at Moorestown 4 E, 14 miles north, 130 ft lower. NOAA, through RCC-ACIS.
