The Junction 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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75° on Nov. 16, 2016, the hottest reading for this week of the year since 1981. Next is 72° in 1999.
Junction’s center stands about 6,010 ft above sea level. Within three miles the land runs from 5,970 ft to 7,120 ft, a difference of 1,150 ft: steep hill country. The highest named summit within 15 miles is Delano Peak, about 12,140 ft, 12 miles northwest.
Under the town center the state geologic map shows Alluvium and colluvium (unconsolidated), from the Quaternary, less than 2.6 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 4×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Felsic-volcanic. Age: Late Oligocene to Middle Miocene, 12 to 28 million years old. About 14 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 7 mi of the line.
Basalt. Age: Early Miocene to Middle Miocene, 12 to 23 million years old. About 3 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 Junction reaches Sevier Lake by way of the Sevier: about 300 river miles. Sevier Lake has no outlet to the sea: the water leaves only by evaporating or soaking into the ground.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Junction; river miles along the main stem, rounded.
Junction has a cold semi-arid climate. Summer afternoons average 85° in July; winter nights fall to about 6° in December. A normal year brings about 20 inches of snow; with the rain, that comes to about 9 inches of water.
On November 14 Junction normally reaches 52° and falls to 16°. The record high is 72°, in 1999; the record low 2°, in 2000. The most rain on this date, 0.16 in, fell in 1987.
Normals 1991–2020 and records since 1981 at Angle, 14 miles east, 400 ft higher. NOAA, through RCC-ACIS.
