The Viola 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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82° on Nov. 17, 1958, the hottest reading for this week of the year since 1891. Next is 80° in 2002.
Viola’s center stands about 1,020 ft above sea level. Within three miles the land runs from 970 ft to 1,610 ft, a difference of 640 ft: hilly country. The highest named summit within 15 miles is Big Butte, about 2,030 ft, 8 miles south-southwest.
Under the town center the state geologic map shows St. Louis Limestone and Warsaw Limestone, from the Carboniferous, 324 to 359 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 18×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 13 mi of the line.
Conglomerate. Age: Carboniferous, 299 to 324 million years old. About 7 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 1 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 1 mi of the line.
Shale. Age: Carboniferous, 324 to 359 million years old. About 1 mi of the line.
Chert. Age: Carboniferous, 324 to 359 million years old. About 0.8 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 Viola reaches the Gulf of America by way of Hickory Creek, the Barren Fork, the Collins, the Caney Fork, the Cumberland, the Ohio and the Mississippi: about 1,460 river miles.
Lake on the way: Bards 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 Viola; river miles along the main stem, rounded.
Viola has a humid subtropical climate. Summer afternoons average 89° in July; winter nights fall to about 31° in January. About 54 inches of rain fall in a normal year, with about 4 inches of snow.
On November 14 Viola normally reaches 62° and falls to 39°. The record high is 79°, in 1993; the record low 18°, in 1986. The most rain on this date, 2.05 in, fell in 1915.
Normals 1991–2020 and records since 1891 at Mc Minnville, 10 miles north-northeast. NOAA, through RCC-ACIS.
