The Humboldt 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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10° on Nov. 12, 2019, the coldest reading for this week of the year since 1982. Next is 11° in 2018.
Humboldt’s center stands about 980 ft above sea level. Within three miles the land runs from 910 ft to 1,000 ft, a difference of 90 ft: gently 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 4 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 5 mi of the line.
Sand, silt, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 3 mi of the line.
Shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 3 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 Humboldt reaches the Gulf of America by way of the Neosho, the Arkansas and the Mississippi: about 1,270 river miles.
Lakes on the way: Murray Lake and Ozark Lake.
600 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Humboldt; river miles along the main stem, rounded.
Humboldt has a hot-summer humid continental climate. Summer afternoons average 90° in July; winter nights fall to about 21° in January. A normal year brings about 9 inches of snow; with the rain, that comes to about 42 inches of water.
On November 14 Humboldt normally reaches 57° and falls to 35°. The record high is 83°, in 1999; the record low 12°, in 2018. The most rain on this date, 0.92 in, fell in 1993.
Normals 1991–2020 and records since 1982 at Humboldt, here. NOAA, through RCC-ACIS.
