The Sundance 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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70° on Nov. 16, 1999, the hottest reading for this week of the year since 1913. Next is 69° in 1967.
Sundance’s center stands about 6,620 ft above sea level. Within three miles the land runs from 5,260 ft to 11,110 ft, a difference of 5,850 ft: mountain country. The highest named summit within 15 miles is Mount Timpanogos, about 11,560 ft, 3 miles west.
Under the town center the state geologic map shows Glacial deposits (unconsolidated), from the Pleistocene, 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 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.
Sandstone. Age: Carboniferous to Permian, 273 to 324 million years old. About 11 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 5 mi of the line.
Clay. Age: Pleistocene, less than 2.6 million years old. About 3 mi of the line.
Limestone. Age: Early Mississippian to Late Mississippian, 324 to 359 million years old. About 3 mi of the line.
Unconsolidated. Age: Pleistocene, less than 2.6 million years old. About 1 mi of the line.
Coarse-detrital. Age: Quaternary, less than 2.6 million years old. About 0.4 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 Sundance reaches Great Salt Lake by way of the North Fork Provo, the Provo and the Jordan: about 85 river miles. Great Salt Lake has no outlet to the sea: the water leaves only by evaporating or soaking into the ground.
Lake on the way: Utah Lake.
50 miles of the trip are on the Jordan.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Sundance; river miles along the main stem, rounded.
Sundance has a dry-summer warm-summer continental climate. Summer afternoons average 88° in July; winter nights fall to about 14° in January. About 22 inches of rain fall in a normal year.
On November 14 Sundance normally reaches 46° and falls to 23°. The record high is 69°, in 1967; the record low −4°, in 1916. The most rain on this date, 1.80 in, fell in 1955.
Normals 1991–2020 and records since 1913 at Snake Creek Powerhouse, 11 miles north-northeast, 610 ft lower. NOAA, through RCC-ACIS.
