The Troy 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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87° on Nov. 14, 1955, the hottest reading for this week of the year since 1908. Next is 86° in 1922.
Troy’s center stands about 540 ft above sea level. Within three miles the land runs from 380 ft to 560 ft, a difference of 180 ft: gently rolling country.
Under the town center the state geologic map shows Midway Group; Clayton Formation (limestone), from the Paleocene, 56 to 66 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand, clay. Age: Cretaceous, 66 to 145 million years old. About 8 mi of the line.
Limestone. Age: Paleocene, 56 to 66 million years old. About 8 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 4 mi of the line.
Clay, sand. Age: Paleocene, 56 to 66 million years old. About 3 mi of the line.
Silt, clay. Age: Paleocene, 56 to 66 million years old. About 0.2 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 Troy reaches Pensacola Bay and the Gulf of America by way of Double Branch, the Conecuh, the Escambia and the Dead: about 200 river miles.
140 miles of the trip are on the Conecuh.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Troy; river miles along the main stem, rounded.
Troy has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 37° in January. About 53 inches of rain fall in a normal year.
On November 14 Troy normally reaches 68° and falls to 45°. The record high is 87°, in 1955; the record low 24°, in 2019. The most rain on this date, 2.00 in, fell in 1930.
Normals 1991–2020 and records since 1908 at Troy, here. NOAA, through RCC-ACIS.
