The Humphreys 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.
Mostly sunny
Partly cloudy; warmer
Sunny
Sunny
Partly cloudy
Partly cloudy
Chance of showers
81° on Nov. 13, 1999, the hottest reading for this week of the year since 1895. Next is 79° in 1949.
Humphreys’s center stands about 910 ft above sea level. Within three miles the land runs from 780 ft to 950 ft, a difference of 170 ft: gently rolling country.
Under the town center the state geologic map shows Marmaton 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 16 mi of the line.
Shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 5 mi of the line.
Shale, sandstone, siltstone. 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 Humphreys reaches the Gulf of America by way of Muddy Creek, the Grand River, the Missouri and the Mississippi: about 1,490 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 Humphreys; river miles along the main stem, rounded.
Humphreys has a hot-summer humid continental climate. Summer afternoons average 89° in July; winter nights fall to about 16° in January. A normal year brings about 17 inches of snow; with the rain, that comes to about 40 inches of water.
On November 14 Humphreys normally reaches 52° and falls to 32°. The record high is 76°, in 1964; the record low 3°, in 1940. The most rain on this date, 2.64 in, fell in 1931.
Normals 1991–2020 and records since 1895 at Trenton, 15 miles west. NOAA, through RCC-ACIS.
