The Avinger 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
Sunny
Partly cloudy
Partly cloudy
Mostly sunny
19° on Nov. 13, 2019, the coldest reading for this week of the year since 1903. Next is 21° in 1997.
Avinger’s center stands about 400 ft above sea level. Within three miles the land runs from 270 ft to 460 ft, a difference of 190 ft: gently rolling country. The highest named summit within 15 miles is Brown Mountain, about 590 ft, 14 miles west-southwest.
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 13 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 5 mi of the line.
Sandstone. Age: Middle Eocene, 38 to 48 million years old. About 5 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.
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 Avinger reaches the Gulf of America by way of Cannon Creek, Black Cypress Creek, Black Cypress Bayou, Big Cypress Bayou, Twelvemile Bayou, Cross Bayou, the Red River, the Atchafalaya and the Lower Atchafalaya: about 490 river miles.
Lake on the way: Clear Lake.
260 miles of the trip are on the Red River.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Avinger; river miles along the main stem, rounded.
Avinger has a humid subtropical climate. Summer afternoons average 94° in July; winter nights fall to about 34° in January. About 50 inches of rain fall in a normal year, with about 1 inch of snow.
On November 14 Avinger normally reaches 67° and falls to 42°. The record high is 82°, in 2007; the record low 19°, in 2019. The most rain on this date, 1.52 in, fell in 1970.
Normals 1991–2020 and records since 1903 at Jefferson, 14 miles southeast, 190 ft lower. NOAA, through RCC-ACIS.
