The Johnson City 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.
2° on Nov. 13, 2014, the coldest reading for this week of the year since 1995. Next is 4° in 2019.
Johnson City’s center stands about 3,330 ft above sea level. Within three miles the land runs from 3,280 ft to 3,390 ft, a difference of 110 ft: gently rolling country.
Under the town center the state geologic map shows Loess (silt), from the Pleistocene to Holocene, less than 2.6 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 46×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Silt. Age: Pleistocene to Holocene, less than 2.6 million years old. About 24 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 0.5 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.
Johnson City has a cold semi-arid climate. Summer afternoons average 94° in July; winter nights fall to about 20° in January. A normal year brings about 22 inches of snow; with the rain, that comes to about 18 inches of water.
On November 14 Johnson City normally reaches 59° and falls to 30°. The record high is 82°, in 2007; the record low 3°, in 2014. The most rain on this date, 0.22 in, fell in 2003.
Normals 1991–2020 and records since 1995 at Johnson, here. NOAA, through RCC-ACIS.