The Yznaga 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
Chance of showers; cooler
Partly cloudy
Partly cloudy; warmer
Partly cloudy
Partly cloudy
28° on Nov. 14, 2018, the coldest reading for this week of the year since 1910. Next is 29° in 1920.
Yznaga’s center stands about 40 ft above sea level. Within three miles the land runs from 40 ft to 50 ft, a difference of 10 ft: nearly flat ground.
Under the town center the state geologic map shows Beaumont Formation, areas predominantly sand, from the Pleistocene, less than 2.6 million years old.
The section below crosses 5 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. Age: Pleistocene, less than 2.6 million years old. About 14 mi of the line.
Clay, silt. Age: Pleistocene, less than 2.6 million years old. About 3 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Silt, sand, clay. Age: Pleistocene, less than 2.6 million years old. About 3 mi of the line.
Fine-detrital, sand. Age: Pleistocene to Holocene, less than 2.6 million 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.
Yznaga has a humid subtropical climate. Summer afternoons average 98° in August; winter nights fall to about 48° in January. About 26 inches of rain fall in a normal year.
On November 14 Yznaga normally reaches 80° and falls to 56°. The record high is 93°, in 2005; the record low 28°, in 2018. The most rain on this date, 1.65 in, fell in 1916.
Normals 1991–2020 and records since 1910 at Raymondville, 10 miles north. NOAA, through RCC-ACIS.
