The Loudon 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 sunny
Mostly sunny; warmer
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81° on Nov. 11, 2020, the hottest reading for this week of the year since 1948. Next is 80° in 1985.
Loudon’s center stands about 850 ft above sea level. Within three miles the land runs from 740 ft to 1,070 ft, a difference of 330 ft: rolling country. The highest named summit within 15 miles is Hiwassee Knobs, about 1,430 ft, 12 miles south-southwest.
The section below crosses 9 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 39×. 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 7 mi of the line.
Dolostone, limestone. Age: Cambrian to Ordovician, 445 to 542 million years old. About 4 mi of the line.
Dolostone. Age: Cambrian, 487 to 542 million years old. About 4 mi of the line.
Dolostone. Age: Cambrian, 487 to 542 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.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 3 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 Loudon reaches the Gulf of America by way of the Tennessee, the Ohio and the Mississippi: about 1,590 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 Loudon; river miles along the main stem, rounded.
Loudon has a humid subtropical climate. Summer afternoons average 89° in July; winter nights fall to about 28° in January. About 55 inches of rain fall in a normal year, with about 4 inches of snow.
On November 14 Loudon normally reaches 62° and falls to 37°. The record high is 80°, in 1985; the record low 19°, in 2019. The most rain on this date, 0.82 in, fell in 2024.
Normals 1991–2020 and records since 1948 at Lenoir City, 6 miles northeast. NOAA, through RCC-ACIS.
