The Cornlea 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
Showers likely
82° on Nov. 13, 1999, the hottest reading for this week of the year since 1893. Next is 81° in 2025.
Cornlea’s center stands about 1,720 ft above sea level. Within three miles the land runs from 1,660 ft to 1,740 ft, a difference of 80 ft: gently rolling country.
Under the town center the state geologic map shows Niobrara Formation (limestone, shale), 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 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.
Limestone, shale. Age: Late Cretaceous, 66 to 100 million years old. About 23 mi of the line.
Siltstone-mudstone, conglomerate-sandstone. Age: Miocene, 5.3 to 23 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 Cornlea reaches the Gulf of America by way of South Fork Union Creek, Union Creek, the Elkhorn, the Platte, the Missouri and the Mississippi: about 1,960 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 Cornlea; river miles along the main stem, rounded.
Cornlea has a hot-summer humid continental climate. Summer afternoons average 86° in July; winter nights fall to about 12° in January. A normal year brings about 30 inches of snow; with the rain, that comes to about 27 inches of water.
On November 14 Cornlea normally reaches 49° and falls to 26°. The record high is 81°, in 2025; the record low −12°, in 1959. The most rain on this date, 1.16 in, fell in 1926.
Normals 1991–2020 and records since 1893 from the Norfolk Area threaded record (Norfolk Karl Stefan Memorial Airport, 22 miles north-northeast, 160 ft lower). NOAA, through RCC-ACIS.
