The Allardt 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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Partly cloudy
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12° on Nov. 13, 2019, the coldest reading for this week of the year since 1951. Next is 16° in 2014.
Allardt’s center stands about 1,670 ft above sea level. Within three miles the land runs from 1,480 ft to 1,720 ft, a difference of 240 ft: rolling country. The highest named summit within 15 miles is Skinner Mountain, about 1,830 ft, 10 miles west.
Under the town center the state geologic map shows Rockcastle Conglomerate (sandstone, conglomerate), from the Carboniferous, 299 to 324 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 17×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, conglomerate. Age: Carboniferous, 299 to 324 million years old. About 17 mi of the line.
Chert. Age: Carboniferous, 324 to 359 million years old. About 2 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 1 mi of the line.
Sandstone, shale. Age: Carboniferous, 299 to 324 million years old. About 1 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 0.9 mi of the line.
Shale. Age: Carboniferous, 299 to 324 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. 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 Allardt reaches the Gulf of America by way of Big Branch, Crooked Creek, the Clear Fork, the Big South Fork Cumberland, the Cumberland, the Ohio and the Mississippi: about 1,640 river miles.
Lakes on the way: Bards Lake, Lake Cumberland and Cordell Hull Reservoir.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Allardt; river miles along the main stem, rounded.
Allardt has a humid subtropical climate. Summer afternoons average 84° in July; winter nights fall to about 25° in January. A normal year brings about 19 inches of snow; with the rain, that comes to about 59 inches of water.
Normals 1991–2020 and records since 1951 at Jamestown, 5 miles northwest. NOAA, through RCC-ACIS.
