The Sedan 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.
Partly cloudy
Partly cloudy; warmer
Mostly sunny
Partly cloudy
Partly cloudy
Partly cloudy
Chance of showers
84° on Nov. 11, 1949, the hottest reading for this week of the year since 1893. Next is 84° in 1989.
Sedan’s center stands about 870 ft above sea level. Within three miles the land runs from 800 ft to 1,040 ft, a difference of 240 ft: rolling country.
Under the town center the state geologic map shows Shawnee 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 45×. 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 10 mi of the line.
Shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 10 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. Age: Carboniferous, 299 to 324 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 Sedan reaches the Gulf of America by way of Middle Caney Creek, the Little Caney, the Caney, the Verdigris, the Arkansas and the Mississippi: about 1,200 river miles.
Lakes on the way: Murray Lake, Ozark Lake and Copan 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 Sedan; river miles along the main stem, rounded.
Sedan has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 22° in January. A normal year brings about 9 inches of snow; with the rain, that comes to about 40 inches of water.
On November 14 Sedan normally reaches 60° and falls to 35°. The record high is 83°, in 1999; the record low 8°, in 1986. The most rain on this date, 1.15 in, fell in 1924.
Normals 1991–2020 and records since 1893 at Sedan, here. NOAA, through RCC-ACIS.
