The Henderson 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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4.18 inches of rain fell in two days, the most for this week of the year since records began in 1902. The next wettest, 3.23 inches, fell in 1993.
Henderson’s center stands about 670 ft above sea level. Within three miles the land runs from 550 ft to 870 ft, a difference of 320 ft: rolling country. The highest named summit within 15 miles is Matney Knob, about 1,210 ft, 13 miles south-southwest.
Under the town center the state geologic map shows Cotter and Jefferson City Dolomites (dolostone), from the Early Ordovician, 471 to 487 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 36×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 12 mi of the line.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 3 mi of the line.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 3 mi of the line.
Sandstone, dolostone. Age: Middle Ordovician, 459 to 471 million years old. About 1 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 Henderson reaches the Gulf of America by way of the North Fork, the White River and the Mississippi: about 1,010 river miles.
620 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Henderson; river miles along the main stem, rounded.
Henderson has a humid subtropical climate. Summer afternoons average 89° in July; winter nights fall to about 26° in January. A normal year brings about 8 inches of snow; with the rain, that comes to about 51 inches of water.
On November 14 Henderson normally reaches 59° and falls to 38°. The record high is 83°, in 1999; the record low 11°, in 1940. The most rain on this date, 2.60 in, fell in 1926.
Normals 1991–2020 and records since 1902 at Mountain Home 1 NNW, 10 miles west-southwest, 130 ft higher. NOAA, through RCC-ACIS.
