The Holladay 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. 12, 1967, the hottest reading for this week of the year since 1874. Next is 74° in 1973.
Holladay’s center stands about 4,470 ft above sea level. Within three miles the land runs from 4,290 ft to 7,940 ft, a difference of 3,650 ft: mountain country. The highest named summit within 15 miles is Twin Peaks, about 11,430 ft, 12 miles southeast.
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 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 7 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 7 mi of the line.
Arenite. Age: Neoproterozoic, 542 to 1,000 million years old. About 5 mi of the line.
Unconsolidated. Age: Pleistocene, less than 2.6 million years old. About 3 mi of the line.
Granodiorite. Age: Middle Eocene to Early Oligocene, 30 to 42 million years old. About 2 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 Holladay reaches Great Salt Lake by way of Big Cottonwood Creek and 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 Holladay; river miles along the main stem, rounded.
Holladay has a dry-summer hot-summer continental climate. Summer afternoons average 94° in July; winter nights fall to about 24° in January. A normal year brings about 52 inches of snow; with the rain, that comes to about 16 inches of water.
On November 14 Holladay normally reaches 52° and falls to 33°. The record high is 71°, in 1967; the record low 3°, in 1955. The most rain on this date, 0.71 in, fell in 1955.
Normals 1991–2020 and records since 1874 from the Salt Lake City Area threaded record (Salt Lake City International Airport, 10 miles northwest, 240 ft lower). NOAA, through RCC-ACIS.
