The Holly Grove 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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6.30 inches of rain fell in two days, the most for this week of the year since records began in 1936. The next wettest, 3.90 inches, fell in 2015.
Holly Grove’s center stands about 180 ft above sea level. Within three miles the land runs from 170 ft to 220 ft, a difference of 50 ft: nearly flat ground.
Under the town center the state geologic map shows Terrace deposits (coarse-detrital, fine-detrital), from the Pleistocene, less than 2.6 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.
Coarse-detrital, fine-detrital. Age: Pleistocene, less than 2.6 million years old. About 17 mi of the line.
Coarse-detrital, fine-detrital. Age: Holocene, less than 12,000 years old. About 4 mi of the line.
Coarse-detrital, fine-detrital. Age: Holocene, less than 12,000 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 Holly Grove reaches the Gulf of America by way of the Boat Gunwale Slash, Dial Creek, Maddox Bay, the White River and the Mississippi: about 700 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Holly Grove; river miles along the main stem, rounded.
Holly Grove has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 33° in January. About 51 inches of rain fall in a normal year, with about 1 inch of snow.
On November 14 Holly Grove normally reaches 63° and falls to 43°. The record high is 86°, in 1955; the record low 20°, in 1940. The most rain on this date, 2.08 in, fell in 1957.
Normals 1991–2020 and records since 1936 at Stuttgart 9 ESE, 15 miles southwest. NOAA, through RCC-ACIS.
