The Boutte 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.
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27° on Nov. 17, 1970, the coldest reading for this week of the year since 1946. Next is 28° in 1968.
Boutte’s center stands about 9 ft above sea level. Within three miles the land runs from 0 ft to 50 ft, a difference of 50 ft: nearly flat ground.
Under the town center the state geologic map shows Natural Levees (silt, clay), from the Holocene, less than 12,000 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.
Clay. Age: Holocene, less than 12,000 years old. About 10 mi of the line.
Clay. Age: Holocene, less than 12,000 years old. About 6 mi of the line.
Silt, clay. Age: Holocene, less than 12,000 years old. About 5 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 Boutte reaches the Gulf of America by way of the Bayou des Allemands: about 55 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Boutte; river miles along the main stem, rounded.
Boutte has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 46° in January. About 63 inches of rain fall in a normal year.
On November 14 Boutte normally reaches 71° and falls to 54°. The record high is 84°, in 2011; the record low 33°, in 1969. The most rain on this date, 1.43 in, fell in 1998.
Normals 1991–2020 and records since 1946 from the New Orleans Area threaded record (New Orleans Airport, 9 miles northeast). NOAA, through RCC-ACIS.
