The Bloomburg 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.
21° on Nov. 13, 2019, the coldest reading for this week of the year since 1947. Next is 23° in 1997.
Bloomburg’s center stands about 320 ft above sea level. Within three miles the land runs from 250 ft to 390 ft, a difference of 140 ft: gently rolling country.
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 6 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. Age: Middle Eocene, 38 to 48 million years old. About 8 mi of the line.
Sandstone. Age: Middle Eocene, 38 to 48 million years old. About 6 mi of the line.
Siltstone, sandstone. Age: Middle Eocene, 38 to 48 million years old. About 5 mi of the line.
Coarse-detrital, fine-detrital. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Sandstone. Age: Eocene, 34 to 56 million years old. About 2 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 0.7 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 Bloomburg reaches the Gulf of America by way of State Line Creek, Black Bayou, Twelvemile Bayou, Cross Bayou, the Red River, the Atchafalaya and the Lower Atchafalaya: about 470 river miles.
Lake on the way: Black Bayou 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 Bloomburg; river miles along the main stem, rounded.
Bloomburg has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 35° in January. About 51 inches of rain fall in a normal year.
On November 14 Bloomburg normally reaches 65° and falls to 45°. The record high is 81°, in 2005; the record low 22°, in 2019. The most rain on this date, 1.60 in, fell in 1970.
Normals 1991–2020 and records since 1947 at Wright Patman Dm & Lk, 13 miles north-northwest. NOAA, through RCC-ACIS.