The Hamilton 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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4.12 inches of rain fell in two days, the most for this week of the year since records began in 1892. The next wettest, 3.84 inches, fell in 1929.
Hamilton’s center stands about 270 ft above sea level. Within three miles the land runs from 210 ft to 370 ft, a difference of 160 ft: gently rolling country.
Under the town center the state geologic map shows Eutaw formation (sand, clay), from the Late Cretaceous, 66 to 100 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 55×. 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: Late Cretaceous, 66 to 100 million years old. About 20 mi of the line.
Sand. Age: Late Cretaceous, 66 to 100 million years old. About 5 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 Hamilton reaches Mobile Bay and the Gulf of America by way of Wilson Creek, McKinley Creek, the Tombigbee and the Mobile: about 370 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Hamilton; river miles along the main stem, rounded.
Hamilton has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 31° in January. About 54 inches of rain fall in a normal year.
On November 14 Hamilton normally reaches 64° and falls to 39°. The record high is 85°, in 1955; the record low 21°, in 1907. The most rain on this date, 3.31 in, fell in 1961.
Normals 1991–2020 and records since 1892 at Aberdeen, 9 miles northwest. NOAA, through RCC-ACIS.
