The Keachi 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
21° on Nov. 13, 2019, the coldest reading for this week of the year since 1871. Next is 23° in 1940.
Keachi’s center stands about 320 ft above sea level. Within three miles the land runs from 270 ft to 390 ft, a difference of 120 ft: gently rolling country.
Under the town center the state geologic map shows Wilcox Group (undifferentiated) (sand, clay, lignite), from the Paleocene, 56 to 66 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.
Sand, clay, lignite. Age: Paleocene, 56 to 66 million years old. About 19 mi of the line.
Clay. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Clay, silt, sand. Age: Pleistocene, less than 2.6 million years old. About 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 Keachi reaches the Gulf of America by way of the Bayou Castor and the Sabine: about 260 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 Keachi; river miles along the main stem, rounded.
Keachi has a humid subtropical climate. Summer afternoons average 95° in August; winter nights fall to about 37° in January. About 51 inches of rain fall in a normal year.
On November 14 Keachi normally reaches 68° and falls to 46°. The record high is 85°, in 1989; the record low 24°, in 1940. The most rain on this date, 2.67 in, fell in 1993.
Normals 1991–2020 and records since 1871 from the Shreveport Area threaded record (Shreveport Airport, 20 miles north-northeast). NOAA, through RCC-ACIS.
