The Tamassee 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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4.96 inches of rain fell in two days, the most for this week of the year since records began in 1896. The next wettest, 3.56 inches, fell in 1935.
Tamassee’s center stands about 1,090 ft above sea level. Within three miles the land runs from 900 ft to 1,230 ft, a difference of 330 ft: rolling country. The highest named summit within 15 miles is Satulah Mountain, about 4,510 ft, 15 miles northwest.
Under the town center the state geologic map shows Granite gneiss, from the Ordovician to Silurian, 422 to 487 million years old.
The section below crosses 8 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.
Hornblende-gneiss, amphibolite. Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 9 mi of the line.
Gneiss. Age: Ordovician to Silurian, 422 to 487 million years old. About 6 mi of the line.
Biotite-gneiss. Age: Neoproterozoic, 542 to 1,000 million years old. About 2 mi of the line.
Metasedimentary. Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 2 mi of the line.
Gneiss. Age: Mesoproterozoic, 1.2 to 1.2 billion years old. About 2 mi of the line.
Mylonite, phyllonite. Age: Carboniferous to Permian, 252 to 359 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. 2 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 Tamassee reaches the Atlantic Ocean by way of the Flat Shoals, the Little River, the Seneca, Little Beaverdam Creek and the Savannah: about 340 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Tamassee; river miles along the main stem, rounded.
Tamassee has a humid subtropical climate. Summer afternoons average 89° in July; winter nights fall to about 29° in January. About 61 inches of rain fall in a normal year, with about 2 inches of snow.
On November 14 Tamassee normally reaches 62° and falls to 37°. The record high is 82°, in 1999; the record low 19°, in 2013. The most rain on this date, 1.40 in, fell in 1961.
Normals 1991–2020 and records since 1896 at Walhalla, 9 miles south-southwest, 110 ft lower. NOAA, through RCC-ACIS.
