The Hamlin 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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12° on Nov. 14, 2019, the coldest reading for this week of the year since 1938. Next is 18° in 1967.
Hamlin’s center stands about 670 ft above sea level. Within three miles the land runs from 630 ft to 1,140 ft, a difference of 510 ft: hilly country. The highest named summit within 15 miles is Blue Knob, about 1,430 ft, 12 miles southeast.
Under the town center the state geologic map shows Allegheny Formation (sandstone, siltstone, shale), from the Carboniferous, 299 to 324 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 32×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, siltstone, sandstone. Age: Carboniferous, 299 to 324 million years old. About 19 mi of the line.
Sandstone, siltstone, shale. Age: Carboniferous, 299 to 324 million years old. About 4 mi of the line.
Sandstone, siltstone, 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.
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 Hamlin reaches the Gulf of America by way of the Mud River, the Guyandotte, the Ohio and the Mississippi: about 1,690 river miles.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Hamlin; river miles along the main stem, rounded.
Hamlin has a humid subtropical climate. Summer afternoons average 87° in July; winter nights fall to about 24° in January. A normal year brings about 11 inches of snow; with the rain, that comes to about 40 inches of water.
On November 14 Hamlin normally reaches 58° and falls to 34°. The record high is 79°, in 1955; the record low 12°, in 2019. The most rain on this date, 0.80 in, fell in 1993.
Normals 1991–2020 and records since 1938 at Winfield Locks, 20 miles north-northeast. NOAA, through RCC-ACIS.
