The Perry 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.
81° on Nov. 14, 1999, the hottest reading for this week of the year since 1900. Next is 78° in 2012.
Perry’s center stands about 960 ft above sea level. Within three miles the land runs from 920 ft to 1,010 ft, a difference of 90 ft: gently rolling country.
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.
Shale, sandstone, siltstone. Age: Early Pennsylvanian to Middle Pennsylvanian, 307 to 324 million years old. About 20 mi of the line.
Dolostone, limestone. Age: Middle Mississippian to Late Mississippian, 324 to 347 million years old. About 4 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 Perry reaches the Gulf of America by way of Beaver Creek, the Des Moines and the Mississippi: about 1,580 river miles.
Lake on the way: Roberts Creek.
1,330 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Perry; river miles along the main stem, rounded.
Perry has a hot-summer humid continental climate. Summer afternoons average 86° in July; winter nights fall to about 10° in January. About 36 inches of rain fall in a normal year.
On November 14 Perry normally reaches 48° and falls to 27°. The record high is 81°, in 1999; the record low −3°, in 1959. The most rain on this date, 1.12 in, fell in 2024.
Normals 1991–2020 and records since 1900 at Perry, here. NOAA, through RCC-ACIS.