The Center Ridge 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 1919. Next is 84° in 1941.
Center Ridge’s center stands about 760 ft above sea level. Within three miles the land runs from 530 ft to 1,040 ft, a difference of 510 ft: hilly country. The highest named summit within 15 miles is Black Mountain, about 1,550 ft, 14 miles north-northwest.
Under the town center the state geologic map shows Atoka Formation, undivided (sandstone, black-shale), from the Carboniferous, 299 to 324 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 24×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, black-shale. Age: Carboniferous, 299 to 324 million years old. About 18 mi of the line.
Sandstone, shale. Age: Carboniferous, 299 to 324 million years old. About 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 Center Ridge reaches the Gulf of America by way of Sunnyside Creek, East Fork Point Remove Creek, Point Remove Creek, the Arkansas and the Mississippi: about 830 river miles.
Lake on the way: Murray Lake.
600 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Center Ridge; river miles along the main stem, rounded.
Center Ridge has a humid subtropical climate. Summer afternoons average 93° in August; winter nights fall to about 29° in January. About 51 inches of rain fall in a normal year, with about 2 inches of snow.
On November 14 Center Ridge normally reaches 63° and falls to 39°. The record high is 84°, in 1964; the record low 16°, in 1940. The most rain on this date, 1.54 in, fell in 1926.
Normals 1991–2020 and records since 1919 at Morrilton, 19 miles southwest, 420 ft lower. NOAA, through RCC-ACIS.
