The Douglas 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.
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78° on Nov. 11, 2019, the hottest reading for this week of the year since 1974. Next is 72° in 1995.
Douglas City’s center stands about 1,680 ft above sea level. Within three miles the land runs from 1,600 ft to 3,130 ft, a difference of 1,530 ft: steep hill country. The highest named summit within 15 miles is Monument Peak, about 7,640 ft, 13 miles north.
Under the town center the state geologic map shows Schist of various types and ages, unit 7 (Klamath Mountains) (amphibolite, schist), from the Devonian, 359 to 422 million 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 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.
Amphibolite, schist. Age: Devonian, 359 to 422 million years old. About 11 mi of the line.
Melange. Age: Devonian to Jurassic, 145 to 422 million years old. About 7 mi of the line.
Sandstone. Age: Oligocene to Miocene, 5.3 to 34 million years old. About 4 mi of the line.
Peridotite, serpentinite. Age: Neoproterozoic to Early Jurassic, 175 to 1,000 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.
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 Douglas City reaches the Pacific Ocean by way of Indian Creek, the Trinity and the Klamath: about 140 river miles.
95 miles of the trip are on the Trinity.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Douglas City; river miles along the main stem, rounded.
Douglas City has a hot-summer Mediterranean climate. Summer afternoons average 96° in July; winter nights fall to about 32° in December. A normal year brings about 6 inches of snow; with the rain, that comes to about 32 inches of water.
On November 14 Douglas City normally reaches 59° and falls to 36°. The record high is 72°, in 2013; the record low 21°, in 1985. The most rain on this date, 1.04 in, fell in 1981.
Normals 1991–2020 and records since 1974 at Trinity River Hatchery, 9 miles east-northeast, 180 ft higher. NOAA, through RCC-ACIS.
