The Lamar 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
Partly cloudy; warmer
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83° on Nov. 11, 2002, the hottest reading for this week of the year since 1948. Next is 81° in 1964.
Lamar’s center stands about 550 ft above sea level. Within three miles the land runs from 440 ft to 650 ft, a difference of 210 ft: rolling country. The highest named summit within 15 miles is Hamer Hill, about 740 ft, 6 miles southeast.
Under the town center the state geologic map shows Tallahatta formation and Neshoba sand (claystone, clay), from the Eocene, 34 to 56 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 51×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Claystone, clay. Age: Eocene, 34 to 56 million years old. About 18 mi of the line.
Silt. Age: Quaternary, less than 2.6 million years old. About 5 mi of the line.
Sand. Age: Tertiary, 2.6 to 66 million years old. About 1 mi of the line.
Fine-detrital, coarse-detrital. Age: Quaternary, less than 2.6 million years old. About 0.8 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 Lamar reaches the Gulf of America by way of Grays Creek, the Wolf River and the Mississippi: about 840 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Lamar; river miles along the main stem, rounded.
Lamar has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 29° in January. About 58 inches of rain fall in a normal year, with about 2 inches of snow.
On November 14 Lamar normally reaches 63° and falls to 38°. The record high is 80°, in 1999; the record low 17°, in 2014. The most rain on this date, 1.05 in, fell in 1972.
Normals 1991–2020 and records since 1948 at Holly Springs 4 N, 9 miles southwest. NOAA, through RCC-ACIS.
