The Hillsboro 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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15° on Nov. 17, 1997, the coldest reading for this week of the year since 1957. Next is 16° in 2019.
Hillsboro’s center stands about 600 ft above sea level. Within three miles the land runs from 570 ft to 680 ft, a difference of 110 ft: gently rolling country. The highest named summit within 15 miles is Courtland Mountain, about 900 ft, 4 miles west-southwest.
Under the town center the state geologic map shows Tuscumbia Limestone, from the Carboniferous, 324 to 359 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 59×. 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 11 mi of the line.
Sandstone. Age: Carboniferous, 324 to 359 million years old. About 6 mi of the line.
Shale. Age: Carboniferous, 324 to 359 million years old. About 2 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 Hillsboro reaches the Gulf of America by way of Guntersville Lake, the Tennessee, the Ohio and the Mississippi: about 1,310 river miles.
Lakes on the way: Guntersville Lake, White Lake (historical) and Pickwick 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 Hillsboro; river miles along the main stem, rounded.
Hillsboro has a humid subtropical climate. Summer afternoons average 88° in July; winter nights fall to about 30° in January. About 60 inches of rain fall in a normal year, with about 2 inches of snow.
On November 14 Hillsboro normally reaches 62° and falls to 38°. The record high is 82°, in 1964; the record low 19°, in 2013. The most rain on this date, 2.53 in, fell in 2005.
Normals 1991–2020 and records since 1957 at Moulton 2, 12 miles south-southwest. NOAA, through RCC-ACIS.
