The Roca 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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Showers likely
79° on Nov. 17, 2016, the hottest reading for this week of the year since 1893. Next is 77° in 2025.
Roca’s center stands about 1,260 ft above sea level. Within three miles the land runs from 1,200 ft to 1,400 ft, a difference of 200 ft: rolling country.
Under the town center the state geologic map shows Council Grove Group (shale, limestone), from the Permian, 252 to 299 million years old.
The section below crosses 4 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.
Shale, limestone. Age: Permian, 252 to 299 million years old. About 15 mi of the line.
Shale, sandstone, limestone. Age: Carboniferous, 299 to 324 million years old. About 7 mi of the line.
Sandstone, shale. Age: Early Cretaceous, 100 to 145 million years old. About 2 mi of the line.
Shale, limestone. Age: Permian, 252 to 299 million years old. About 0.6 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 Roca reaches the Gulf of America by way of Wahoo Creek, the Platte, the Missouri and the Mississippi: about 1,830 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 Roca; river miles along the main stem, rounded.
Roca has a hot-summer humid continental climate. Summer afternoons average 87° in July; winter nights fall to about 14° in January. A normal year brings about 25 inches of snow; with the rain, that comes to about 31 inches of water.
On November 14 Roca normally reaches 52° and falls to 29°. The record high is 74°, in 2025; the record low −1°, in 1940. The most rain on this date, 1.91 in, fell in 1926.
Normals 1991–2020 and records since 1893 at Crete 4 ESE, 12 miles west-southwest, 200 ft higher. NOAA, through RCC-ACIS.
