The Acala 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.
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86° on Nov. 14, 2017, the hottest reading for this week of the year since 1946. Next is 85° in 2025.
Acala’s center stands about 3,550 ft above sea level. Within three miles the land runs from 3,530 ft to 3,840 ft, a difference of 310 ft: rolling country. The highest named summit within 15 miles is Campo Grande Mountain, about 4,250 ft, 12 miles east.
Under the town center the state geologic map shows Alluvium (fine-detrital, coarse-detrital), 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 9×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Fine-detrital, sand. Age: Pliocene to Pleistocene, less than 5.3 million years old. About 9 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 1 mi of the line.
Sand. 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 Acala reaches the Gulf of America by way of the Rio Grande: about 1,200 river miles.
Lakes on the way: Paz Ramirez Lake and Amistad Reservoir.
600 miles of the trip are on the Rio Grande.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Acala; river miles along the main stem, rounded.
Acala has a cold desert climate. Summer afternoons average 98° in June; winter nights fall to about 29° in January. About 8 inches of rain fall in a normal year, with about 2 inches of snow.
On November 14 Acala normally reaches 70° and falls to 36°. The record high is 86°, in 2017; the record low 19°, in 2018. The most rain on this date, 0.59 in, fell in 2004.
Normals 1991–2020 and records since 1946 at Tornillo 2 SSE, 10 miles west-northwest. NOAA, through RCC-ACIS.
