The Yantis 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.
87° on Nov. 14, 2005, the hottest reading for this week of the year since 1989. Next is 84° in 1989.
Yantis’s center stands about 480 ft above sea level. Within three miles the land runs from 400 ft to 510 ft, a difference of 110 ft: gently rolling country.
Under the town center the state geologic map shows Wilcox Group, undivided (mudstone), from the Late Paleocene to Early Eocene, 48 to 59 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.
Mudstone. Age: Late Paleocene to Early Eocene, 48 to 59 million years old. About 19 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Sandstone. Age: Eocene, 34 to 56 million years old. About 0.2 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 Yantis reaches the Gulf of America by way of Little Caney Creek, Lake Fork Creek and the Sabine: about 450 river miles.
Lakes on the way: Toledo Bend Reservoir, Sabine Lake and Case Lake.
180 miles of the trip are on the Sabine.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Yantis; river miles along the main stem, rounded.
Yantis has a humid subtropical climate. Summer afternoons average 93° in July; winter nights fall to about 35° in January. About 45 inches of rain fall in a normal year.
On November 14 Yantis normally reaches 66° and falls to 46°. The record high is 87°, in 2005; the record low 29°, in 2018. The most rain on this date, 0.65 in, fell in 1993.
Normals 1991–2020 and records since 1989 at Lake Fork Reservoir, 8 miles south-southeast. NOAA, through RCC-ACIS.