The Alliance 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.
Mostly cloudy
Mostly sunny; warmer
Partly cloudy
Partly cloudy
Mostly sunny
Partly cloudy
Showers likely
−14° on Nov. 12, 2000, the coldest reading for this week of the year since 1996. Next is −13° in 2014.
Alliance’s center stands about 3,980 ft above sea level. Within three miles the land runs from 3,930 ft to 4,030 ft, a difference of 100 ft: gently rolling country. The highest named summit within 15 miles is Cowboy Hill, about 4,240 ft, 14 miles south-southwest.
Under the town center the state geologic map shows Ogallala Group or Formation (siltstone-mudstone, conglomerate-sandstone), from the Miocene, 5.3 to 23 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Siltstone-mudstone, conglomerate-sandstone. Age: Miocene, 5.3 to 23 million years old. About 15 mi of the line.
Sand, volcanic. Age: Late Oligocene to Miocene, 5.3 to 28 million years old. About 9 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.
Alliance has a cold semi-arid climate. Summer afternoons average 88° in July; winter nights fall to about 9° in December. About 15 inches of rain fall in a normal year.
On November 14 Alliance normally reaches 50° and falls to 18°. The record high is 77°, in 2025; the record low −8°, in 2000. The most rain on this date, 0.11 in, fell in 2005.
Normals 1991–2020 and records since 1996 at Alliance Municipal Airport Asos, 5 miles southeast. NOAA, through RCC-ACIS.
