The Agua Dulce 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.
30° on Nov. 14, 2018, the coldest reading for this week of the year since 1948. Next is 33° in 1950.
Agua Dulce’s center stands about 130 ft above sea level. Within three miles the land runs from 100 ft to 150 ft, a difference of 50 ft: nearly flat ground.
Under the town center the state geologic map shows Beaumont Formation, areas predominantly clay (clay, silt), from the Pleistocene, less than 2.6 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 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.
Clay, silt. Age: Pleistocene, less than 2.6 million years old. About 15 mi of the line.
Silt, sand, clay. Age: Pleistocene, less than 2.6 million years old. About 5 mi of the line.
Sand. Age: Pleistocene, less than 2.6 million years old. About 4 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 0.7 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 Agua Dulce reaches the Gulf of America by way of Agua Dulce Creek and Petronila Creek: about 60 river miles.
Often dry. About 30% of the way is mapped as streams that run only after rain or snowmelt; the water makes the whole trip in floods.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Agua Dulce; river miles along the main stem, rounded.
Agua Dulce has a humid subtropical climate. Summer afternoons average 98° in August; winter nights fall to about 45° in January. About 29 inches of rain fall in a normal year.
On November 14 Agua Dulce normally reaches 78° and falls to 54°. The record high is 93°, in 2020; the record low 30°, in 2018. The most rain on this date, 4.44 in, fell in 2001.
Normals 1991–2020 and records since 1948 at Alice International Airport, 8 miles west-southwest. NOAA, through RCC-ACIS.