The Karns 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.
Sunny
Mostly sunny; warmer
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17° on Nov. 15, 1969, the coldest reading for this week of the year since 1947. Next is 19° in 1974.
Karns’s center stands about 990 ft above sea level. Within three miles the land runs from 790 ft to 1,280 ft, a difference of 490 ft: hilly country. The highest named summit within 15 miles is Pilot Mountain, about 3,280 ft, 15 miles northwest.
Under the town center the state geologic map shows Middle and Lower parts of Chickamauga Group, including Moccassin Formation, Bays Formation, Sevier Shale, Ottosee Shale, Holston Formation, Lenoir Limestone, and Athens Shale (shale, limestone), from the Ordovician, 445 to 487 million years old.
The section below crosses 18 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.
Dolostone, limestone. Age: Ordovician, 445 to 487 million years old. About 6 mi of the line.
Shale. Age: Cambrian, 487 to 542 million years old. About 4 mi of the line.
Limestone. Age: Ordovician, 445 to 487 million years old. About 3 mi of the line.
Shale. Age: Cambrian, 487 to 542 million years old. About 2 mi of the line.
Shale. Age: Ordovician, 445 to 487 million years old. About 2 mi of the line.
Shale, limestone. Age: Ordovician, 445 to 487 million years old. About 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. 12 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 Karns reaches the Gulf of America by way of Beaver Creek, the Clinch, the Tennessee, the Ohio and the Mississippi: about 1,630 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 Karns; river miles along the main stem, rounded.
Karns has a humid subtropical climate. Summer afternoons average 89° in July; winter nights fall to about 30° in January. About 56 inches of rain fall in a normal year.
On November 14 Karns normally reaches 61° and falls to 38°. The record high is 78°, in 1999; the record low 20°, in 1986. The most rain on this date, 1.40 in, fell in 2024.
Normals 1991–2020 and records since 1947 from the Oak Ridge Area threaded record (Oak Ridge Asos, 8 miles west-northwest). NOAA, through RCC-ACIS.
