The Seymour 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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Mostly sunny; warmer
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85° on Nov. 11, 2020, the hottest reading for this week of the year since 1955. Next is 82° in 1993.
Seymour’s center stands about 950 ft above sea level. Within three miles the land runs from 900 ft to 1,380 ft, a difference of 480 ft: hilly country. The highest named summit within 15 miles is Cove Mountain, about 4,090 ft, 15 miles south-southeast.
Under the town center the state geologic map shows Jonesboro Limestone, Newala Formation, Mascot Dolomite, Kingsport Formation, Longview Dolomite, and Chepultepec Dolomite (limestone, dolostone), from the Ordovician, 445 to 487 million years old.
The section below crosses 17 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 9×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale. Age: Ordovician, 445 to 487 million years old. About 5 mi of the line.
Shale. Age: Precambrian. About 4 mi of the line.
Shale. Age: Ordovician, 445 to 487 million years old. About 3 mi of the line.
Limestone, dolostone. Age: Ordovician, 445 to 487 million years old. About 3 mi of the line.
Shale. Age: Precambrian. About 1 mi of the line.
Shale. Age: Cambrian, 487 to 542 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. 11 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 Seymour reaches the Gulf of America by way of Nails Creek, the Little River, the Tennessee, the Ohio and the Mississippi: about 1,660 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 Seymour; river miles along the main stem, rounded.
Seymour has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 27° in January. About 49 inches of rain fall in a normal year, with about 4 inches of snow.
On November 14 Seymour normally reaches 62° and falls to 36°. The record high is 82°, in 1993; the record low 16°, in 1969. The most rain on this date, 0.48 in, fell in 1998.
Normals 1991–2020 and records since 1955 at Sevierville, 8 miles east-northeast. NOAA, through RCC-ACIS.
