The Jourdanton 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.
Chance of showers
Chance of showers
Mostly cloudy; cooler
Partly cloudy
Mostly cloudy
Chance of showers
Chance of showers
25° on Nov. 14, 2018, the coldest reading for this week of the year since 1948. Next is 27° in 2008.
Jourdanton’s center stands about 490 ft above sea level. Within three miles the land runs from 390 ft to 520 ft, a difference of 130 ft: gently rolling country.
Under the town center the state geologic map shows Cook Mountain Formation (claystone, sandstone), from the Eocene, 34 to 56 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 63×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Claystone, sandstone. Age: Eocene, 34 to 56 million years old. About 15 mi of the line.
Claystone, sandstone. Age: Eocene, 34 to 56 million years old. About 4 mi of the line.
Sandstone. Age: Eocene, 34 to 56 million years old. About 3 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 1 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 Jourdanton reaches Corpus Christi Bay and the Gulf of America by way of Goose Creek, La Parita Creek, the Atascosa, the Frio and the Nueces: about 160 river miles.
Lake on the way: Lake Corpus Christi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Jourdanton; river miles along the main stem, rounded.
Jourdanton has a humid subtropical climate. Summer afternoons average 97° in August; winter nights fall to about 40° in January. About 32 inches of rain fall in a normal year.
On November 14 Jourdanton normally reaches 74° and falls to 50°. The record high is 89°, in 2025; the record low 25°, in 2018. The most rain on this date, 0.78 in, fell in 2001.
Normals 1991–2020 and records since 1948 at Pleasanton, 5 miles northeast, 130 ft lower. NOAA, through RCC-ACIS.
