The Union 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.
Partly cloudy
Showers likely; cooler
Chance of showers; warmer
Partly cloudy
Partly cloudy
Partly cloudy
Mostly sunny
19° on Nov. 13, 2019, the coldest reading for this week of the year since 1902. Next is 20° in 1916.
Union Grove’s center stands about 390 ft above sea level. Within three miles the land runs from 300 ft to 490 ft, a difference of 190 ft: gently rolling country. The highest named summit within 15 miles is Underwood Mountain, about 690 ft, 10 miles north-northwest.
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 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 50×. 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 21 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 0.9 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 Union Grove reaches the Gulf of America by way of Moody Creek and the Sabine: about 360 river miles.
Lakes on the way: Toledo Bend Reservoir and Sabine Lake.
140 miles of the trip are on the Sabine.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Union Grove; river miles along the main stem, rounded.
Union Grove has a humid subtropical climate. Summer afternoons average 95° in August; winter nights fall to about 37° in January. About 45 inches of rain fall in a normal year.
On November 14 Union Grove normally reaches 68° and falls to 45°. The record high is 89°, in 1955; the record low 22°, in 1907. The most rain on this date, 1.25 in, fell in 1970.
Normals 1991–2020 and records since 1902 from the Longview Area threaded record (Longview E Tx Regional Airport, 17 miles southeast). NOAA, through RCC-ACIS.
