The Herriman 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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75° on Nov. 15, 2016, the hottest reading for this week of the year since 1899. Next is 74° in 1999.
Herriman’s center stands about 4,940 ft above sea level. Within three miles the land runs from 4,620 ft to 6,160 ft, a difference of 1,540 ft: steep hill country. The highest named summit within 15 miles is Lone Peak, about 11,120 ft, 15 miles east.
Under the town center the state geologic map shows Lake Bonneville deposits (clay), from the Pleistocene, less than 2.6 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 3×. 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.
Sandstone. Age: Carboniferous to Permian, 273 to 324 million years old. About 6 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 5 mi of the line.
Latite, quartz-latite. Age: Late Eocene to Oligocene, 23 to 38 million years old. About 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 Herriman reaches Great Salt Lake by way of Rose Creek and the Jordan: about 40 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 Herriman; river miles along the main stem, rounded.
Herriman has a dry-summer hot-summer continental climate. Summer afternoons average 89° in July; winter nights fall to about 22° in January. A normal year brings about 74 inches of snow; with the rain, that comes to about 21 inches of water.
On November 14 Herriman normally reaches 51° and falls to 30°. The record high is 67°, in 2016; the record low 9°, in 1978. The most rain on this date, 1.06 in, fell in 1987.
Normals 1991–2020 and records since 1899 at Alpine, 14 miles east-southeast, 160 ft higher. NOAA, through RCC-ACIS.
