The Shannon Hills 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
Partly cloudy
Mostly sunny
Partly cloudy
Mostly sunny
17° on Nov. 13, 2019, the coldest reading for this week of the year since 1875. Next is 20° in 1940.
Shannon Hills’s center stands about 340 ft above sea level. Within three miles the land runs from 300 ft to 560 ft, a difference of 260 ft: rolling country. The highest named summit within 15 miles is Shinall Mountain, about 1,080 ft, 14 miles north-northwest.
Under the town center the state geologic map shows Wilcox Group (sand, fine-detrital), from the Early Eocene, 48 to 56 million years old.
The section below crosses 9 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 51×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand, fine-detrital. Age: Early Eocene, 48 to 56 million years old. About 7 mi of the line.
Sand, clay. Age: Middle Eocene, 38 to 48 million years old. About 6 mi of the line.
Black-shale. Age: Middle Ordovician, 459 to 471 million years old. About 3 mi of the line.
Novaculite. Age: Late Devonian to Carboniferous, 324 to 384 million years old. About 2 mi of the line.
Black-shale, sandstone, siltstone. Age: Carboniferous, 324 to 359 million years old. About 2 mi of the line.
Coarse-detrital, fine-detrital. Age: Holocene, less than 12,000 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. 3 smaller units along the line are not listed.
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 Shannon Hills reaches the Gulf of America by way of Otter Creek, Fourche Creek, the Arkansas and the Mississippi: about 750 river miles.
600 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Shannon Hills; river miles along the main stem, rounded.
Shannon Hills has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 31° in January. About 50 inches of rain fall in a normal year, with about 4 inches of snow.
On November 14 Shannon Hills normally reaches 62° and falls to 40°. The record high is 83°, in 1999; the record low 22°, in 1986. The most rain on this date, 3.57 in, fell in 1958.
Normals 1991–2020 and records since 1875 from the Little Rock Area threaded record (Little Rock Airport Adams Field, 12 miles northeast). NOAA, through RCC-ACIS.
