The Sherman 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.
Chance of showers
Showers likely; cooler
Chance of showers; warmer
Sunny
Chance of showers
Chance of showers
Partly cloudy
8.22 inches of rain fell in two days, the most for this week of the year since records began in 1897. The next wettest, 6.03 inches, fell in 1978.
Sherman’s center stands about 740 ft above sea level. Within three miles the land runs from 640 ft to 830 ft, a difference of 190 ft: gently rolling country.
Under the town center the state geologic map shows Austin Chalk (marlstone, chalk), from the Late Cretaceous, 66 to 100 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 59×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Black-shale, siltstone. Age: Late Cretaceous, 66 to 100 million years old. About 10 mi of the line.
Marlstone, chalk. Age: Late Cretaceous, 66 to 100 million years old. About 10 mi of the line.
Sandstone-mudstone. Age: Late Cretaceous, 66 to 100 million years old. About 3 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 1 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 million 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 Sherman reaches the Gulf of America by way of Sand Creek, Post Oak Creek, Choctaw Creek, the Red River, the Atchafalaya and the Lower Atchafalaya: about 830 river miles.
660 miles of the trip are on the Red River.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Sherman; river miles along the main stem, rounded.
Sherman has a humid subtropical climate. Summer afternoons average 93° in July; winter nights fall to about 34° in January. About 44 inches of rain fall in a normal year.
On November 14 Sherman normally reaches 64° and falls to 44°. The record high is 86°, in 1955; the record low 21°, in 1940. The most rain on this date, 7.93 in, fell in 1994.
Normals 1991–2020 and records since 1897 at Sherman, 5 miles north-northwest. NOAA, through RCC-ACIS.
