The Grass 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.
Partly cloudy
Mostly sunny; warmer
Mostly sunny
Partly cloudy
Partly cloudy
Partly cloudy; cooler
Showers likely
80° on Nov. 15, 2025, the hottest reading for this week of the year since 1909. Next is 79° in 1953.
Grass Ranch Colony’s center stands about 1,640 ft above sea level. Within three miles the land runs from 1,590 ft to 1,680 ft, a difference of 90 ft: gently rolling country.
Under the town center the state geologic map shows Pierre Shale (shale, bentonite), from the Late Cretaceous, 66 to 100 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 58×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, bentonite. Age: Late Cretaceous, 66 to 100 million years old. About 23 mi of the line.
Chalk, marlstone, shale. Age: Late Cretaceous, 66 to 100 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 Grass Ranch Colony reaches the Gulf of America by way of Platte Creek, the Missouri and the Mississippi: about 2,130 river miles.
Lakes on the way: Lake Francis Case and Lewis and Clark Lake.
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 Grass Ranch Colony; river miles along the main stem, rounded.
Grass Ranch Colony has a hot-summer humid continental climate. Summer afternoons average 86° in July; winter nights fall to about 8° in January. A normal year brings about 38 inches of snow; with the rain, that comes to about 24 inches of water.
On November 14 Grass Ranch Colony normally reaches 45° and falls to 23°. The record high is 77°, in 1953; the record low −18°, in 1959. The most rain on this date, 1.10 in, fell in 1971.
Normals 1991–2020 and records since 1909 at White Lake, 11 miles east-northeast. NOAA, through RCC-ACIS.
