The Ardmore 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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Sunny
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90° on Nov. 16, 2025, the hottest reading for this week of the year since 1894. Next is 89° in 1911.
Ardmore’s center stands about 880 ft above sea level. Within three miles the land runs from 790 ft to 930 ft, a difference of 140 ft: gently rolling country.
Under the town center the state geologic map shows Oscar Group (shale, sandstone, limestone), from the Carboniferous, 299 to 324 million years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 59×. 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, conglomerate, shale. Age: Carboniferous, 299 to 324 million years old. About 6 mi of the line.
Black-shale. Age: Late Devonian, 359 to 384 million years old. About 5 mi of the line.
Sandstone. Age: Early Cretaceous, 100 to 145 million years old. About 5 mi of the line.
Limestone, sandstone, shale. Age: Carboniferous, 299 to 324 million years old. About 3 mi of the line.
Shale, sandstone, limestone. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.
Fine-detrital. Age: Holocene, less than 12,000 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. 1 smaller unit along the line are not listed.
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 Ardmore reaches the Gulf of America by way of Sand Creek, Caddo Creek, the Washita, the Red River, the Atchafalaya and the Lower Atchafalaya: about 900 river miles.
680 miles of the trip are on the Red River.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Ardmore; river miles along the main stem, rounded.
Ardmore has a humid subtropical climate. Summer afternoons average 95° in July; winter nights fall to about 26° in January. About 37 inches of rain fall in a normal year, with about 2 inches of snow.
On November 14 Ardmore normally reaches 65° and falls to 38°. The record high is 83°, in 1973; the record low 12°, in 2018. The most rain on this date, 1.70 in, fell in 1994.
Normals 1991–2020 and records since 1894 at Healdton 3 E, 16 miles west-northwest. NOAA, through RCC-ACIS.
