The Ider 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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10° on Nov. 15, 1969, the coldest reading for this week of the year since 1893. Next is 12° in 1940.
Ider’s center stands about 1,530 ft above sea level. Within three miles the land runs from 1,360 ft to 1,640 ft, a difference of 280 ft: rolling country. The highest named summit within 15 miles is Gulf Mountain, about 2,220 ft, 14 miles east-southeast.
Under the town center the state geologic map shows Pottsville Formation (sandstone, conglomerate), from the Carboniferous, 299 to 324 million years old.
The section below crosses 11 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 13×. 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.
Limestone, dolostone, shale. Age: Carboniferous, 324 to 359 million years old. About 1 mi of the line.
Dolostone. Age: Cambrian to Ordovician, 445 to 542 million years old. About 1 mi of the line.
Sandstone, shale, conglomerate. Age: Carboniferous, 299 to 324 million years old. About 1 mi of the line.
Limestone. Age: Ordovician, 445 to 487 million years old. About 0.8 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 0.7 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 5 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 Ider reaches the Gulf of America by way of Koger Creek, Boydston Creek, Coon Creek, the Tennessee, the Ohio and the Mississippi: about 1,430 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 Ider; river miles along the main stem, rounded.
Ider has a humid subtropical climate. Summer afternoons average 86° in July; winter nights fall to about 30° in January. A normal year brings about 5 inches of snow; with the rain, that comes to about 58 inches of water.
On November 14 Ider normally reaches 61° and falls to 38°. The record high is 80°, in 1931; the record low 18°, in 2013. The most rain on this date, 2.53 in, fell in 1957.
Normals 1991–2020 and records since 1893 at Valley Head, 11 miles south-southeast, 410 ft lower. NOAA, through RCC-ACIS.
