The Cross Mountain 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
Showers likely
Mostly cloudy; cooler
Partly cloudy
Mostly cloudy
Chance of showers
Partly cloudy
8.70 inches of rain fell in two days, the most for this week of the year since records began in 1893. The next wettest, 5.20 inches, fell in 2004.
Cross Mountain’s center stands about 1,430 ft above sea level. Within three miles the land runs from 1,120 ft to 1,510 ft, a difference of 390 ft: rolling country. The highest named summit within 15 miles is Cap Mountain, about 1,910 ft, 15 miles west-northwest.
Under the town center the state geologic map shows Edwards Limestone, from the Early Cretaceous, 100 to 113 million 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 18×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone, marlstone. Age: Early Cretaceous, 100 to 145 million years old. About 11 mi of the line.
Limestone. Age: Early Cretaceous, 100 to 113 million years old. About 9 mi of the line.
Marlstone, chalk. Age: Late Cretaceous, 66 to 100 million years old. About 3 mi of the line.
Limestone. Age: Late Cretaceous, 66 to 100 million years old. About 0.9 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 Cross Mountain reaches the Gulf of America by way of Lee Creek, Helotes Creek, Culebra Creek, Leon Creek, the Medina, the San Antonio, the Guadalupe and the South Guadalupe: about 280 river miles.
210 miles of the trip are on the San Antonio.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Cross Mountain; river miles along the main stem, rounded.
Cross Mountain has a humid subtropical climate. Summer afternoons average 94° in August; winter nights fall to about 36° in January. About 38 inches of rain fall in a normal year.
On November 14 Cross Mountain normally reaches 70° and falls to 46°. The record high is 93°, in 1921; the record low 23°, in 2018. The most rain on this date, 4.00 in, fell in 1907.
Normals 1991–2020 and records since 1893 at Boerne, 11 miles north-northwest. NOAA, through RCC-ACIS.
