The Kirkman 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
Partly cloudy
Mostly sunny
Partly cloudy
Partly cloudy
Mostly sunny
Showers likely
−14° on Nov. 12, 2019, the coldest reading for this week of the year since 1893. Next is −7° in 1959.
Kirkman’s center stands about 1,280 ft above sea level. Within three miles the land runs from 1,210 ft to 1,410 ft, a difference of 200 ft: gently rolling country.
Under the town center the state geologic map shows Upper Cherokee Group (shale, siltstone), from the Middle Pennsylvanian, 307 to 315 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 63×. 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: Middle Pennsylvanian, 307 to 315 million years old. About 9 mi of the line.
Shale, sandstone, siltstone. Age: Early Pennsylvanian to Middle Pennsylvanian, 307 to 324 million years old. About 9 mi of the line.
Shale, siltstone. Age: Middle Pennsylvanian, 307 to 315 million years old. About 7 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 Kirkman reaches the Gulf of America by way of the West Nishnabotna, the Nishnabotna, the Missouri and the Mississippi: about 1,810 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 Kirkman; river miles along the main stem, rounded.
Kirkman has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 9° in January. About 35 inches of rain fall in a normal year.
On November 14 Kirkman normally reaches 47° and falls to 25°. The record high is 78°, in 1999; the record low −7°, in 1959. The most rain on this date, 2.30 in, fell in 1926.
Normals 1991–2020 and records since 1893 at Audubon, 18 miles east. NOAA, through RCC-ACIS.
