The Annada 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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6° on Nov. 12, 2019, the coldest reading for this week of the year since 1948. Next is 16° in 1995.
Annada’s center stands about 450 ft above sea level. Within three miles the land runs from 440 ft to 790 ft, a difference of 350 ft: rolling country. The highest named summit within 15 miles is Buffalo Knob, about 1,030 ft, 12 miles west.
Under the town center the state geologic map shows Holocene series (clay, silt, sand), from the Holocene, less than 12,000 years old.
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.
Clay, silt, sand. Age: Holocene, less than 12,000 years old. About 6 mi of the line.
Limestone. Age: Middle Ordovician to Late Ordovician, 445 to 471 million years old. About 5 mi of the line.
Limestone. Age: Early Mississippian to Middle Mississippian, 331 to 359 million years old. About 4 mi of the line.
Limestone. Age: Silurian, 422 to 445 million years old. About 3 mi of the line.
Limestone, siltstone. Age: Carboniferous, 324 to 359 million years old. About 3 mi of the line.
Limestone, shale. Age: Early Mississippian, 347 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. 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 Annada reaches the Gulf of America by way of Bryants Creek and the Mississippi: about 1,230 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Annada; river miles along the main stem, rounded.
Annada has a hot-summer humid continental climate. Summer afternoons average 87° in July; winter nights fall to about 20° in January. A normal year brings about 12 inches of snow; with the rain, that comes to about 38 inches of water.
On November 14 Annada normally reaches 54° and falls to 35°. The record high is 79°, in 1999; the record low 10°, in 2019. The most rain on this date, 0.73 in, fell in 1993.
Normals 1991–2020 and records since 1948 at Clarksville L&D 24, 9 miles north-northwest. NOAA, through RCC-ACIS.
