The Knoxville 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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86° on Nov. 11, 2020, the hottest reading for this week of the year since 1892. Next is 85° in 1958.
Knoxville’s center stands about 460 ft above sea level. Within three miles the land runs from 380 ft to 700 ft, a difference of 320 ft: rolling country.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 55×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Biotite-gneiss. Age: Precambrian to Paleozoic. About 10 mi of the line.
Clay, sand. Age: Cretaceous, 66 to 145 million years old. About 7 mi of the line.
Sand, clay. Age: Cretaceous, 66 to 145 million years old. About 6 mi of the line.
Clay, sand. Age: Cretaceous, 66 to 145 million years old. About 1 mi of the line.
Hornblende-gneiss. Age: Precambrian to Paleozoic. About 0.5 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 Knoxville reaches the Gulf of America by way of Culpepper Creek, Avery Creek, Beaver Creek, the Flint and the Apalachicola: about 320 river miles.
200 miles of the trip are on the Flint.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Knoxville; river miles along the main stem, rounded.
Knoxville has a humid subtropical climate. Summer afternoons average 94° in July; winter nights fall to about 36° in January. About 47 inches of rain fall in a normal year.
On November 14 Knoxville normally reaches 70° and falls to 42°. The record high is 83°, in 1955; the record low 21°, in 2013. The most rain on this date, 1.40 in, fell in 1957.
Normals 1991–2020 and records since 1892 from the Macon Area threaded record (Macon Middle Ga Regional Airport, 20 miles east, 120 ft lower). NOAA, through RCC-ACIS.
