The Thomasville 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. 12, 2010, the hottest reading for this week of the year since 1940. Next is 81° in 1999.
Thomasville’s center stands about 640 ft above sea level. Within three miles the land runs from 630 ft to 1,000 ft, a difference of 370 ft: rolling country. The highest named summit within 15 miles is High Hill, about 1,160 ft, 9 miles north-northwest.
Under the town center the state geologic map shows Gasconade Dolomite (dolostone), from the Early Ordovician, 471 to 487 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 38×. 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, chert. Age: Early Ordovician, 471 to 487 million years old. About 20 mi of the line.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 4 mi of the line.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 0.1 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 Thomasville reaches the Gulf of America by way of the Eleven Point, the Black River, the White River and the Mississippi: about 1,050 river miles.
620 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Thomasville; river miles along the main stem, rounded.
Thomasville has a humid subtropical climate. Summer afternoons average 88° in July; winter nights fall to about 22° in January. About 47 inches of rain fall in a normal year, with about 4 inches of snow.
On November 14 Thomasville normally reaches 57° and falls to 34°. The record high is 81°, in 1999; the record low 12°, in 1969. The most rain on this date, 0.63 in, fell in 1997.
Normals 1991–2020 and records since 1940 at Alton, 10 miles southeast, 170 ft higher. NOAA, through RCC-ACIS.
