The Okolona 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.
Sunny
Mostly sunny; warmer
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Mostly sunny
Mostly sunny
4.14 inches of rain fell in two days, the most for this week of the year since records began in 1987. The next wettest, 3.23 inches, fell in 2005.
Okolona’s center stands about 330 ft above sea level. Within three miles the land runs from 250 ft to 400 ft, a difference of 150 ft: gently rolling country. The highest named summit within 15 miles is Witch Dance Hill, about 560 ft, 10 miles west-southwest.
Under the town center the state geologic map shows Demopolis chalk, from the Late Cretaceous, 66 to 100 million years old.
The section below crosses 7 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.
Chalk. Age: Late Cretaceous, 66 to 100 million years old. About 16 mi of the line.
Chalk, clay. Age: Late Cretaceous, 66 to 100 million years old. About 4 mi of the line.
Sand, clay, limestone. Age: Late Cretaceous, 66 to 100 million years old. About 2 mi of the line.
Sand. Age: Late Cretaceous, 66 to 100 million years old. About 2 mi of the line.
Limestone. Age: Paleocene, 56 to 66 million years old. About 0.6 mi of the line.
Sand, clay. Age: Late Cretaceous, 66 to 100 million years old. About 0.5 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit 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 Okolona reaches Mobile Bay and the Gulf of America by way of Tallabinnela Creek, Town Creek, the Tombigbee and the Mobile: about 420 river miles.
350 miles of the trip are on the Tombigbee.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Okolona; river miles along the main stem, rounded.
Okolona has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 32° in January. About 59 inches of rain fall in a normal year.
On November 14 Okolona normally reaches 65° and falls to 41°. The record high is 78°, in 1999; the record low 21°, in 2013. The most rain on this date, 2.55 in, fell in 2005.
Normals 1991–2020 and records since 1987 at Verona Experiment Station, 11 miles north. NOAA, through RCC-ACIS.
