The D'Hanis 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.
Mostly cloudy
Chance of showers
Mostly cloudy; cooler
Partly cloudy
Partly cloudy
Partly cloudy
Partly cloudy
25° on Nov. 17, 2014, the coldest reading for this week of the year since 1975. Next is 25° in 2018.
D'Hanis’s center stands about 890 ft above sea level. Within three miles the land runs from 840 ft to 1,050 ft, a difference of 210 ft: rolling country.
Under the town center the state geologic map shows Leona Formation (coarse-detrital, fine-detrital), from the Pleistocene, less than 2.6 million years old.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 48×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Coarse-detrital, fine-detrital. Age: Pleistocene, less than 2.6 million years old. About 7 mi of the line.
Marlstone, chalk. Age: Late Cretaceous, 66 to 100 million years old. About 5 mi of the line.
Black-shale. Age: Late Cretaceous, 66 to 72 million years old. About 5 mi of the line.
Clay, sand. Age: Paleocene to Eocene, 34 to 66 million years old. About 4 mi of the line.
Mudstone. Age: Late Paleocene to Early Eocene, 48 to 59 million years old. About 2 mi of the line.
Limestone. Age: Late Cretaceous, 66 to 100 million 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. 2 smaller units along the line are not listed.
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 D'Hanis reaches Corpus Christi Bay and the Gulf of America by way of Parkers Creek, Seco Creek, Hondo Creek, the Frio and the Nueces: about 260 river miles.
Lakes on the way: Horseshoe Tank and Lake Corpus Christi.
90 miles of the trip are on the Frio.
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 D'Hanis; river miles along the main stem, rounded.
D'Hanis has a humid subtropical climate. Summer afternoons average 97° in July; winter nights fall to about 39° in January. About 25 inches of rain fall in a normal year.
On November 14 D'Hanis normally reaches 74° and falls to 48°. The record high is 91°, in 1983; the record low 25°, in 2018. The most rain on this date, 0.87 in, fell in 2001.
Normals 1991–2020 and records since 1975 at Hondo Municipal Airport, 7 miles east-northeast. NOAA, through RCC-ACIS.
