The Gratton 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
Mostly cloudy
Partly cloudy; warmer
Partly cloudy
Partly cloudy
Mostly sunny
Mostly sunny
73° on Nov. 17, 1958, the hottest reading for this week of the year since 1896. Next is 73° in 1993.
Gratton’s center stands about 2,800 ft above sea level. Within three miles the land runs from 2,570 ft to 4,340 ft, a difference of 1,770 ft: steep hill country. The highest named summit within 15 miles is Hutchinson Rock, about 4,520 ft, 2 miles south-southeast.
Under the town center the state geologic map shows Knox Group (dolostone, limestone), from the Cambrian to Ordovician, 445 to 542 million years old.
The section below crosses 15 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 8×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Age: Ordovician to Silurian, 422 to 487 million years old. About 4 mi of the line.
Shale. Age: Ordovician, 445 to 487 million years old. About 3 mi of the line.
Shale, sandstone. Age: Devonian, 359 to 422 million years old. About 2 mi of the line.
Dolostone, limestone. Age: Cambrian to Ordovician, 445 to 542 million years old. About 2 mi of the line.
Shale, sandstone, mudstone. Age: Carboniferous, 324 to 359 million years old. About 2 mi of the line.
Sandstone. Age: Carboniferous, 299 to 324 million 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. 9 smaller units 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 Gratton reaches the Gulf of America by way of the South Fork Clinch, the Clinch, the Tennessee, the Ohio and the Mississippi: about 1,910 river miles.
Lakes on the way: Guntersville Lake, White Lake (historical), Pickwick Lake and Cummings Lake.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Gratton; river miles along the main stem, rounded.
Gratton has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 21° in January. A normal year brings about 47 inches of snow; with the rain, that comes to about 48 inches of water.
On November 14 Gratton normally reaches 52° and falls to 29°. The record high is 70°, in 1994; the record low 3°, in 2019. The most rain on this date, 1.20 in, fell in 1915.
Normals 1991–2020 and records since 1896 at Burkes Garden, 5 miles southeast, 270 ft higher. NOAA, through RCC-ACIS.
