The Natchez 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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5.85 inches of rain fell in two days, the most for this week of the year since records began in 1892. The next wettest, 5.26 inches, fell in 1929.
Natchez’s center stands about 220 ft above sea level. Within three miles the land runs from 30 ft to 300 ft, a difference of 270 ft: rolling country.
Under the town center the state geologic map shows Catahoula formation (sand), from the Miocene, 5.3 to 23 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 45×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Clay, sand. Age: Miocene, 5.3 to 23 million years old. About 7 mi of the line.
Clay. Age: Holocene, less than 12,000 years old. About 6 mi of the line.
Sand. Age: Miocene, 5.3 to 23 million years old. About 6 mi of the line.
Silt, clay. Age: Holocene, less than 12,000 years old. About 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.
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 Natchez reaches the Gulf of America by way of Spanish Bayou, Saint Catherine Creek and the Mississippi: about 380 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Natchez; river miles along the main stem, rounded.
Natchez has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 36° in January. About 60 inches of rain fall in a normal year.
On November 14 Natchez normally reaches 67° and falls to 43°. The record high is 87°, in 1921; the record low 22°, in 2019. The most rain on this date, 4.29 in, fell in 1998.
Normals 1991–2020 and records since 1892 at Natchez, 4 miles east-northeast. NOAA, through RCC-ACIS.
