The Sheridan 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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Chance of showers
−8° on Nov. 13, 2014, the coldest reading for this week of the year since 1981. Next is 1° in 1997.
Sheridan’s center stands about 5,290 ft above sea level. Within three miles the land runs from 5,260 ft to 5,540 ft, a difference of 280 ft: rolling country. The highest named summit within 15 miles is Doublehead Mountain, about 8,900 ft, 14 miles west-southwest.
Under the town center the state geologic map shows Modern alluvium (unconsolidated), from the Quaternary, less than 2.6 million years old.
The section below crosses 14 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 8×. 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, silt. Age: Quaternary, less than 2.6 million years old. About 10 mi of the line.
Gravel, unconsolidated. Age: Pleistocene, 0.2 to 1.6 million years old. About 3 mi of the line.
Biotite-gneiss, schist, migmatite. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 3 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 2 mi of the line.
Gravel, unconsolidated. Age: Pleistocene, less than 0.5 million years old. About 1 mi of the line.
Sandstone, mudstone, conglomerate. Age: Late Cretaceous to Paleocene, 56 to 100 million years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 8 smaller units along the line are not listed.
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 Sheridan reaches the Gulf of America by way of Bear Creek, the South Platte, the Platte, the Missouri and the Mississippi: about 2,410 river miles.
1,170 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Sheridan; river miles along the main stem, rounded.
Sheridan has a hot-summer humid continental climate. Summer afternoons average 88° in July; winter nights fall to about 17° in January. A normal year brings about 76 inches of snow; with the rain, that comes to about 17 inches of water.
On November 14 Sheridan normally reaches 56° and falls to 24°. The record high is 82°, in 1990; the record low −5°, in 2014. The most rain on this date, 0.82 in, fell in 1987.
Normals 1991–2020 and records since 1981 at Wheat Ridge 2, 10 miles north-northwest, 100 ft higher. NOAA, through RCC-ACIS.
