The Coahoma 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.
Mostly sunny
Mostly sunny; warmer
Sunny
Sunny
Mostly sunny
Mostly sunny
Mostly sunny
12° on Nov. 15, 1940, the coldest reading for this week of the year since 1892. Next is 18° in 1986.
Coahoma’s center stands about 180 ft above sea level. Within three miles the land runs from 150 ft to 200 ft, a difference of 50 ft: nearly flat ground.
Under the town center the state geologic map shows Alluvium (fine-detrital, coarse-detrital), from the Holocene, less than 12,000 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: Holocene, less than 12,000 years old. About 22 mi of the line.
Silt. Age: Pleistocene, less than 2.6 million years old. About 1 mi of the line.
Coarse-detrital, fine-detrital. Age: Holocene, less than 12,000 years old. About 0.5 mi of the line.
Coarse-detrital, fine-detrital. Age: Holocene, less than 12,000 years old. About 0.3 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 Coahoma reaches the Gulf of America by way of Mill Creek, the Yazoo Pass, the Coldwater, the Tallahatchie, the Yazoo and the Mississippi: about 760 river miles.
450 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Coahoma; river miles along the main stem, rounded.
Coahoma has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 32° in January. About 50 inches of rain fall in a normal year.
On November 14 Coahoma normally reaches 62° and falls to 42°. The record high is 85°, in 1955; the record low 18°, in 1986. The most rain on this date, 2.24 in, fell in 1957.
Normals 1991–2020 and records since 1892 at Helena, 11 miles north-northwest. NOAA, through RCC-ACIS.
