The Glasco 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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83° on Nov. 13, 1999, the hottest reading for this week of the year since 1885. Next is 80° in 2016.
Glasco’s center stands about 1,330 ft above sea level. Within three miles the land runs from 1,310 ft to 1,470 ft, a difference of 160 ft: gently rolling country.
Under the town center the state geologic map shows Loess (silt), from the Pleistocene to Holocene, less than 2.6 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 58×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Silt. Age: Pleistocene to Holocene, less than 2.6 million years old. About 10 mi of the line.
Limestone, shale. Age: Late Cretaceous, 66 to 100 million years old. About 8 mi of the line.
Sand, silt, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 4 mi of the line.
Claystone, mudstone, shale. Age: Early Cretaceous, 100 to 145 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 Glasco reaches the Gulf of America by way of the Solomon, the Smoky Hill, the Kansas, the Missouri and the Mississippi: about 1,870 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 Glasco; river miles along the main stem, rounded.
Glasco has a hot-summer humid continental climate. Summer afternoons average 90° in July; winter nights fall to about 19° in January. A normal year brings about 19 inches of snow; with the rain, that comes to about 28 inches of water.
On November 14 Glasco normally reaches 54° and falls to 32°. The record high is 76°, in 2025; the record low 0°, in 1940. The most rain on this date, 0.74 in, fell in 1926.
Normals 1991–2020 and records since 1885 from the Concordia Area threaded record (Concordia Asos, 16 miles northeast, 130 ft higher). NOAA, through RCC-ACIS.
