The Ayers Ranch Colony 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 sunny
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Showers likely; cooler
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Chance of showers
−26° on Nov. 13, 1955, the coldest reading for this week of the year since 1914. Next is −25° in 1959.
Ayers Ranch Colony’s center stands about 3,600 ft above sea level. Within three miles the land runs from 3,530 ft to 4,060 ft, a difference of 530 ft: hilly country. The highest named summit within 15 miles is Lewis Peak, about 5,660 ft, 15 miles north-northwest.
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 9×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Mudstone, siltstone, limestone. Age: Late Mississippian, 324 to 331 million years old. About 5 mi of the line.
Shale. Age: Late Cretaceous, 90 to 94 million years old. About 4 mi of the line.
Shale. Age: Late Cretaceous, 90 to 100 million years old. About 3 mi of the line.
Black-shale, sandstone. Age: Late Cretaceous, 94 to 100 million years old. About 3 mi of the line.
Mudstone, siltstone, sandstone. Age: Early Cretaceous, 100 to 133 million years old. About 2 mi of the line.
Shale. Age: Early Cretaceous, 100 to 113 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. 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 Ayers Ranch Colony reaches the Gulf of America by way of North Fork McDonald Creek, McDonald Creek, Box Elder Creek, Flatwillow Creek, the Musselshell, the Missouri and the Mississippi: about 3,220 river miles.
Lakes on the way: Lake Oahe, Lake Sakakawea, Lake Fort Peck and Lake Sharpe.
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 Ayers Ranch Colony; river miles along the main stem, rounded.
Ayers Ranch Colony has a warm-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 14° in January. A normal year brings about 50 inches of snow; with the rain, that comes to about 18 inches of water.
On November 14 Ayers Ranch Colony normally reaches 47° and falls to 23°. The record high is 75°, in 1999; the record low −15°, in 1959. The most rain on this date, 0.19 in, fell in 2005.
Normals 1991–2020 and records since 1914 at Grass Range, 7 miles east-southeast, 110 ft lower. NOAA, through RCC-ACIS.
