The Arp 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 cloudy
Showers likely; cooler
Chance of showers; warmer
Partly cloudy
Partly cloudy
Partly cloudy
Mostly sunny
20° on Nov. 13, 2019, the coldest reading for this week of the year since 1908. Next is 21° in 2018.
Arp’s center stands about 510 ft above sea level. Within three miles the land runs from 410 ft to 580 ft, a difference of 170 ft: gently rolling country. The highest named summit within 15 miles is Snow Mountain, about 660 ft, 15 miles west-southwest.
Under the town center the state geologic map shows Queen City Sand (siltstone, sandstone), from the Middle Eocene, 38 to 48 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 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.
Siltstone, sandstone. Age: Middle Eocene, 38 to 48 million years old. About 18 mi of the line.
Sandstone. Age: Eocene, 34 to 56 million years old. About 3 mi of the line.
Sandstone. Age: Eocene, 34 to 56 million years old. About 2 mi of the line.
Fine-detrital, coarse-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.
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 Arp reaches the Gulf of America by way of Kickapoo Creek, Mud Creek, the Angelina and the Neches: about 330 river miles.
Lakes on the way: Ester Lake, Sabine Lake and B A Steinhagen Lake.
110 miles of the trip are on the Neches.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Arp; river miles along the main stem, rounded.
Arp has a humid subtropical climate. Summer afternoons average 95° in August; winter nights fall to about 36° in January. About 50 inches of rain fall in a normal year.
On November 14 Arp normally reaches 68° and falls to 44°. The record high is 87°, in 1955; the record low 20°, in 2019. The most rain on this date, 1.65 in, fell in 1915.
Normals 1991–2020 and records since 1908 at Henderson, 15 miles east-southeast. NOAA, through RCC-ACIS.
