The Hillsdale 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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80° on Nov. 13, 1999, the hottest reading for this week of the year since 1945. Next is 78° in 1949.
Hillsdale’s center stands about 920 ft above sea level. Within three miles the land runs from 870 ft to 1,070 ft, a difference of 200 ft: rolling country.
Under the town center the state geologic map shows Kansas City Group (limestone, shale), from the Carboniferous, 299 to 324 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 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: Carboniferous, 299 to 324 million years old. About 14 mi of the line.
Shale, limestone. Age: Carboniferous, 299 to 324 million years old. About 8 mi of the line.
Sand, silt, clay. Age: Pleistocene to Holocene, less than 2.6 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 Hillsdale reaches the Gulf of America by way of Ten Mile Creek, Bull Creek, the Marais des Cygnes, the Osage, the Missouri and the Mississippi: about 1,690 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 Hillsdale; river miles along the main stem, rounded.
Hillsdale has a hot-summer humid continental climate. Summer afternoons average 89° in July; winter nights fall to about 20° in January. About 38 inches of rain fall in a normal year.
On November 14 Hillsdale normally reaches 55° and falls to 34°. The record high is 78°, in 1964; the record low 9°, in 1959. The most rain on this date, 1.60 in, fell in 1968.
Normals 1991–2020 and records since 1945 at Olathe Johnson County Industrial Airport, 11 miles north, 140 ft higher. NOAA, through RCC-ACIS.
