The South Jordan 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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Showers likely
76° on Nov. 15, 1999, the hottest reading for this week of the year since 1917. Next is 75° in 1941.
South Jordan’s center stands about 4,800 ft above sea level. Within three miles the land runs from 4,450 ft to 5,050 ft, a difference of 600 ft: hilly country. The highest named summit within 15 miles is Twin Peaks, about 11,240 ft, 15 miles east.
Under the town center the state geologic map shows Alluvium and colluvium (unconsolidated), from the Quaternary, less than 2.6 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 4×. 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. Age: Pleistocene, less than 2.6 million years old. About 10 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 4 mi of the line.
Sandstone. Age: Carboniferous to Permian, 273 to 324 million years old. About 4 mi of the line.
Coarse-detrital. Age: Quaternary, less than 2.6 million years old. About 4 mi of the line.
Granodiorite. Age: Middle Eocene to Early Oligocene, 30 to 42 million years old. About 3 mi of the line.
Limestone, sandstone-mudstone. Age: Permian, 252 to 299 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.
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 South Jordan reaches Great Salt Lake by way of the Jordan: about 30 river miles. Great Salt Lake has no outlet to the sea: the water leaves only by evaporating or soaking into the ground.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of South Jordan; river miles along the main stem, rounded.
South Jordan has a dry-summer hot-summer continental climate. Summer afternoons average 91° in July; winter nights fall to about 23° in January. A normal year brings about 82 inches of snow; with the rain, that comes to about 24 inches of water.
On November 14 South Jordan normally reaches 50° and falls to 32°. The record high is 70°, in 1990; the record low 13°, in 1978. The most rain on this date, 1.39 in, fell in 1955.
Normals 1991–2020 and records since 1917 at Cottonwood Weir, 12 miles east-northeast, 190 ft higher. NOAA, through RCC-ACIS.
