The San Augustine 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 sunny
Showers likely; cooler
Showers likely; warmer
Partly cloudy
Partly cloudy
Mostly sunny
Mostly sunny
17° on Nov. 13, 2019, the coldest reading for this week of the year since 1909. Next is 20° in 1916.
San Augustine’s center stands about 350 ft above sea level. Within three miles the land runs from 280 ft to 550 ft, a difference of 270 ft: rolling country. The highest named summit within 15 miles is Forse Mountain, about 600 ft, 8 miles east.
Under the town center the state geologic map shows Weches Formation (sandstone), from the Middle Eocene, 38 to 48 million years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 59×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone. Age: Eocene, 34 to 56 million years old. About 7 mi of the line.
Mudstone. Age: Late Paleocene to Early Eocene, 48 to 59 million years old. About 6 mi of the line.
Claystone, sandstone. Age: Eocene, 34 to 56 million years old. About 4 mi of the line.
Sandstone. Age: Middle Eocene, 38 to 48 million years old. About 4 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 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. 1 smaller unit along the line are not listed.
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 San Augustine reaches the Gulf of America by way of Ayish Bayou, the Angelina and the Neches: about 220 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 San Augustine; river miles along the main stem, rounded.
San Augustine has a humid subtropical climate. Summer afternoons average 94° in August; winter nights fall to about 35° in January. About 56 inches of rain fall in a normal year.
On November 14 San Augustine normally reaches 70° and falls to 44°. The record high is 86°, in 2005; the record low 24°, in 2019. The most rain on this date, 1.82 in, fell in 1998.
Normals 1991–2020 and records since 1909 at San Augustine, here. NOAA, through RCC-ACIS.
