The Forks 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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10.46 inches of rain fell in two days, the most for this week of the year since records began in 1907. The next wettest, 9.05 inches, fell in 1919.
Forks’s center stands about 300 ft above sea level. Within three miles the land runs from 120 ft to 1,200 ft, a difference of 1,080 ft: steep hill country. The highest named summit within 15 miles is Hunger Mountain, about 3,340 ft, 14 miles east.
Under the town center the state geologic map shows Terrace deposits (gravel, sand), from the Pleistocene, 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 11×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Gravel, sand. Age: Pleistocene, less than 2.6 million years old. About 12 mi of the line.
Graywacke, slate, argillite. Age: Eocene to Miocene, 5.3 to 56 million years old. About 7 mi of the line.
Sand, gravel. Age: Pleistocene, less than 2.6 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 Forks reaches the Pacific Ocean by way of the Calawah, the Bogachiel and the Quillayute: about 20 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Forks; river miles along the main stem, rounded.
Forks has a oceanic climate. Summer afternoons average 74° in August; winter nights fall to about 34° in February. A normal year brings about 8 inches of snow; with the rain, that comes to about 120 inches of water.
On November 14 Forks normally reaches 51° and falls to 38°. The record high is 62°, in 1995; the record low 11°, in 1955. The most rain on this date, 3.40 in, fell in 2021.
Normals 1991–2020 and records since 1907 at Forks 1 E, here. NOAA, through RCC-ACIS.
