The Sudan 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.
0° on Nov. 17, 2014, the coldest reading for this week of the year since 1921. Next is 3° in 1976.
Sudan’s center stands about 3,760 ft above sea level. Within three miles the land runs from 3,670 ft to 3,840 ft, a difference of 170 ft: gently rolling country.
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 52×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand. Age: Pleistocene, less than 2.6 million years old. About 21 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Sand. Age: Late Miocene to Pliocene, 2.6 to 12 million years old. About 0.4 mi of the line.
Sand. 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 Sudan reaches the Gulf of America by way of the North Fork Double Mountain Fork Brazos, the Double Mountain Fork Brazos and the Brazos: about 1,240 river miles.
Lakes on the way: Possum Kingdom Lake and Lake Granbury.
550 miles of the trip are on the Brazos.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Sudan; river miles along the main stem, rounded.
Sudan has a cold semi-arid climate. Summer afternoons average 92° in July; winter nights fall to about 20° in January. A normal year brings about 8 inches of snow; with the rain, that comes to about 18 inches of water.
On November 14 Sudan normally reaches 62° and falls to 28°. The record high is 85°, in 1933; the record low 3°, in 1976. The most rain on this date, 0.50 in, fell in 2004.
Normals 1991–2020 and records since 1921 at Muleshoe No 1, 16 miles northwest. NOAA, through RCC-ACIS.