The Yancey 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.
Partly cloudy
Chance of showers
Mostly cloudy; cooler
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Chance of showers
25° on Nov. 17, 2014, the coldest reading for this week of the year since 1975. Next is 25° in 2018.
Yancey’s center stands about 670 ft above sea level. Within three miles the land runs from 630 ft to 760 ft, a difference of 130 ft: gently rolling country. The highest named summit within 15 miles is Fohn Hill, about 1,020 ft, 10 miles north-northwest.
Under the town center the state geologic map shows Wilcox Group, undivided (mudstone), from the Late Paleocene to Early Eocene, 48 to 59 million years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 53×. 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, sand. Age: Paleocene to Eocene, 34 to 66 million years old. About 6 mi of the line.
Mudstone. Age: Late Paleocene to Early Eocene, 48 to 59 million years old. About 5 mi of the line.
Siltstone, sandstone. Age: Middle Eocene, 38 to 48 million years old. About 4 mi of the line.
Gravel. Age: Late Pliocene to Pleistocene, less than 3.6 million years old. About 4 mi of the line.
Sandstone. Age: Eocene, 34 to 56 million years old. About 2 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit 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 Yancey reaches Corpus Christi Bay and the Gulf of America by way of Tehuacana Creek, Hondo Creek, the Frio and the Nueces: about 240 river miles.
Lakes on the way: Horseshoe Tank and Lake Corpus Christi.
90 miles of the trip are on the Frio.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Yancey; river miles along the main stem, rounded.
Yancey 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 Yancey 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, 15 miles north, 250 ft higher. NOAA, through RCC-ACIS.
