The Ridgely 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.
86° on Nov. 13, 1955, the hottest reading for this week of the year since 1893. Next is 83° in 1964.
Ridgely’s center stands about 290 ft above sea level. Within three miles the land runs from 260 ft to 300 ft, a difference of 40 ft: nearly flat ground.
Under the town center the state geologic map shows Alluvial deposits (fine-detrital, coarse-detrital), from the Quaternary, less than 2.6 million years old.
The section below crosses 4 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.
Fine-detrital, coarse-detrital. Age: Quaternary, less than 2.6 million years old. About 14 mi of the line.
Silt. Age: Quaternary, less than 2.6 million years old. About 7 mi of the line.
Clay, silt, sand. Age: Holocene, less than 12,000 years old. About 1 mi of the line.
Sand. Age: Tertiary, 2.6 to 66 million years old. About 1 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 Ridgely reaches the Gulf of America by way of Running Reelfoot Bayou, the Obion and the Mississippi: about 880 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Ridgely; river miles along the main stem, rounded.
Ridgely has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 30° in January. About 55 inches of rain fall in a normal year.
On November 14 Ridgely normally reaches 60° and falls to 40°. The record high is 82°, in 1955; the record low 17°, in 1940. The most rain on this date, 3.00 in, fell in 1957.
Normals 1991–2020 and records since 1893 at Caruthersville, 11 miles west-southwest. NOAA, through RCC-ACIS.