The St. Martinville 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
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Mostly sunny; warmer
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8.02 inches of rain fell in two days, the most for this week of the year since records began in 1893. The next wettest, 5.17 inches, fell in 2000.
St. Martinville’s center stands about 30 ft above sea level. Within three miles the land runs from 10 ft to 70 ft, a difference of 60 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 2 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.
Silt, clay. Age: Holocene, less than 12,000 years old. About 14 mi of the line.
Clay. Age: Holocene, less than 12,000 years old. About 10 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 St. Martinville reaches the Gulf of America by way of the Bayou Tortue, the Coulee Crow, the Vermilion and Onion Bayou: about 65 river miles.
50 miles of the trip are on the Vermilion.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of St. Martinville; river miles along the main stem, rounded.
St. Martinville has a humid subtropical climate. Summer afternoons average 92° in August; winter nights fall to about 43° in January. About 63 inches of rain fall in a normal year.
On November 14 St. Martinville normally reaches 72° and falls to 50°. The record high is 87°, in 1951; the record low 29°, in 1911. The most rain on this date, 3.22 in, fell in 1989.
Normals 1991–2020 and records since 1893 at Lafayette Regional Airport, 11 miles west-northwest. NOAA, through RCC-ACIS.
