The Arbyrd 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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5.81 inches of rain fell in two days, the most for this week of the year since records began in 1979. The next wettest, 4.02 inches, fell in 2011.
Arbyrd’s center stands about 250 ft above sea level. Within three miles the land runs from 240 ft to 250 ft, a difference of 10 ft: nearly flat ground.
Under the town center the state geologic map shows Holocene series (clay, silt, sand), from the Holocene, less than 12,000 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.
Clay, silt, sand. Age: Holocene, less than 12,000 years old. About 10 mi of the line.
Coarse-detrital, fine-detrital. Age: Pleistocene, less than 2.6 million years old. About 9 mi of the line.
Coarse-detrital, fine-detrital. Age: Holocene, less than 12,000 years old. About 5 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 Arbyrd reaches the Gulf of America by way of the Right Hand Chute Little, Iron Mines Creek, the Saint Francis and the Mississippi: about 880 river miles.
690 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Arbyrd; river miles along the main stem, rounded.
Arbyrd has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 28° in January. About 52 inches of rain fall in a normal year, with about 2 inches of snow.
On November 14 Arbyrd normally reaches 60° and falls to 39°. The record high is 77°, in 1999; the record low 18°, in 2019. The most rain on this date, 1.73 in, fell in 1993.
Normals 1991–2020 and records since 1979 at Paragould 1 S, 14 miles west. NOAA, through RCC-ACIS.
