The San Carlos 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
Mostly cloudy
Mostly cloudy; warmer
Partly cloudy
Partly cloudy
33° on Nov. 14, 2018, the coldest reading for this week of the year since 1941. Next is 34° in 1970.
San Carlos’s center stands about 80 ft above sea level. Within three miles the land runs from 70 ft to 90 ft, a difference of 20 ft: nearly flat ground.
Under the town center the state geologic map shows Dune sand sheet deposits, from the Holocene, less than 12,000 years old.
The section below crosses 4 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, sand, clay. Age: Pleistocene, less than 2.6 million years old. About 16 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 7 mi of the line.
Fine-detrital, sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 1 mi of the line.
Clay, silt. Age: Pleistocene, less than 2.6 million years old. About 0.5 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.
San Carlos has a hot semi-arid climate. Summer afternoons average 100° in August; winter nights fall to about 53° in January. About 22 inches of rain fall in a normal year.
On November 14 San Carlos normally reaches 80° and falls to 60°. The record high is 93°, in 1989; the record low 33°, in 2018. The most rain on this date, 0.20 in, fell in 1959.
Normals 1991–2020 and records since 1941 from the McAllen Area threaded record (Mcallen Miller International Airport, 13 miles southwest). NOAA, through RCC-ACIS.
