The Washougal 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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71° on Nov. 14, 1999, the hottest reading for this week of the year since 1965. Next is 70° in 2001.
Washougal’s center stands about 70 ft above sea level. Within three miles the land runs from 0 ft to 740 ft, a difference of 740 ft: hilly country. The highest named summit within 15 miles is Silver Star Mountain, about 4,340 ft, 12 miles north-northeast.
Under the town center the state geologic map shows Quaternary nonmarine deposits (sandstone, clay, volcanic), from the Pleistocene, less than 2.6 million years old.
The section below crosses 11 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 6×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Basalt, basaltic-andesite. Age: Late Eocene to Oligocene, 23 to 38 million years old. About 8 mi of the line.
Sandstone-mudstone. Age: Pliocene to Pleistocene, less than 5.3 million years old. About 5 mi of the line.
Clay, silt, sand. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
Granodiorite, granite. Age: Early Paleocene to Middle Miocene, 12 to 66 million years old. About 2 mi of the line.
Sand, gravel, silt. Age: Holocene, less than 12,000 years old. About 1 mi of the line.
Sandstone, clay, volcanic. Age: Pleistocene, less than 2.6 million years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 5 smaller units along the line are not listed.
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 Washougal reaches the Pacific Ocean by way of the Washougal and the Columbia: about 120 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Washougal; river miles along the main stem, rounded.
Washougal has a warm-summer Mediterranean climate. Summer afternoons average 81° in July; winter nights fall to about 35° in January. About 48 inches of rain fall in a normal year.
On November 14 Washougal normally reaches 52° and falls to 41°. The record high is 71°, in 1999; the record low 23°, in 1985. The most rain on this date, 1.20 in, fell in 1966.
Normals 1991–2020 and records since 1965 at Portland Troutdale Airport, 4 miles southwest. NOAA, through RCC-ACIS.
