The Grandwood Park 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.
72° on Nov. 11, 1964, the hottest reading for this week of the year since 1944. Next is 71° in 1971.
Grandwood Park’s center stands about 760 ft above sea level. Within three miles the land runs from 680 ft to 810 ft, a difference of 130 ft: gently rolling country. The highest named summit within 15 miles is Gander Mountain, about 960 ft, 13 miles northwest.
Under the town center the state geologic map shows Silurian System undivided (dolostone, limestone), from the Silurian, 422 to 445 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 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.
Dolostone, limestone. Age: Silurian, 422 to 445 million years old. About 22 mi of the line.
Dolostone. Age: Silurian, 422 to 445 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 Grandwood Park reaches the Gulf of America by way of Mill Creek, the Des Plaines, the Illinois and the Mississippi: about 1,570 river miles.
Lake on the way: Peoria Lake.
1,190 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Grandwood Park; river miles along the main stem, rounded.
Grandwood Park has a hot-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about 17° in January. A normal year brings about 36 inches of snow; with the rain, that comes to about 38 inches of water.
On November 14 Grandwood Park normally reaches 48° and falls to 33°. The record high is 71°, in 1971; the record low 10°, in 1959. The most rain on this date, 1.09 in, fell in 1957.
Normals 1991–2020 and records since 1944 at Kenosha Wwtp, 15 miles northeast, 160 ft lower. NOAA, through RCC-ACIS.