The Brookings 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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81° on Nov. 11, 1969, the hottest reading for this week of the year since 1912. Next is 79° in 1930.
Brookings’s center stands about 130 ft above sea level. Within three miles the land runs from 0 ft to 1,300 ft, a difference of 1,300 ft: steep hill country. Open water lies within three miles. The highest named summit within 15 miles is Bosley Butte, about 3,390 ft, 11 miles north-northeast.
Under the town center the state geologic map shows Alluvial deposits (sand, gravel, silt), from the Holocene, less than 12,000 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 8×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Graywacke, mudstone. Age: Late Jurassic to Early Cretaceous, 129 to 153 million years old. About 8 mi of the line.
Sand, gravel, silt. Age: Holocene, less than 12,000 years old. About 4 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 Brookings reaches the Pacific Ocean by way of Harris Creek: about 1 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Brookings; river miles along the main stem, rounded.
Brookings has a warm-summer Mediterranean climate. Summer afternoons average 69° in July; winter nights fall to about 42° in January. About 78 inches of rain fall in a normal year.
On November 14 Brookings normally reaches 58° and falls to 45°. The record high is 68°, in 1969; the record low 30°, in 1955. The most rain on this date, 2.62 in, fell in 1934.
Normals 1991–2020 and records since 1912 at Brookings, here. NOAA, through RCC-ACIS.
