The Olmito 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.
Partly cloudy
Chance of showers; warmer
Chance of showers; cooler
Partly cloudy
Mostly cloudy; warmer
Partly cloudy
Partly cloudy
25° on Nov. 14, 2007, the coldest reading for this week of the year since 1913. Next is 29° in 1955.
Olmito’s center stands about 40 ft above sea level. Within three miles the land runs from 10 ft to 50 ft, a difference of 40 ft: nearly flat ground.
Under the town center the state geologic map shows Alluvium in Rio Grande, subdivided into areas predominantly of sand (silt, sand), 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.
Silt, clay. Age: Holocene, less than 12,000 years old. About 10 mi of the line.
Silt, sand. Age: Holocene, less than 12,000 years old. About 9 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 0.8 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.
Olmito has a warm-summer Mediterranean climate. Summer afternoons average 69° in July; winter nights fall to about 42° in January. About 78 inches of rain fall in a normal year.
On November 14 Olmito normally reaches 58° and falls to 45°. The record high is 68°, in 1969; the record low 25°, in 2007. The most rain on this date, 2.62 in, fell in 1934.
Normals 1991–2020 and records since 1913 from the Brookings Area threaded record (Brownsville S Padre Island International Airport, 10 miles southeast). NOAA, through RCC-ACIS.
