The Columbia 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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3.59 inches of rain fell in two days, the most for this week of the year since records began in 1928. The next wettest, 3.45 inches, fell in 1946.
Columbia City’s center stands about 50 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 Davis Peak, about 2,910 ft, 12 miles northeast.
Under the town center the state geologic map shows Lacustrine and fluvial sedimentary rocks (clay, silt, sand), from the Pleistocene, less than 2.6 million years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 10×. 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. Age: Miocene, 5.3 to 23 million years old. About 7 mi of the line.
Basalt, basaltic-andesite. Age: Late Eocene to Oligocene, 23 to 38 million years old. About 6 mi of the line.
Silt, sand, gravel. Age: Pleistocene, less than 2.6 million years old. About 4 mi of the line.
Silt, sand. Age: Holocene, less than 12,000 years old. About 4 mi of the line.
Conglomerate. Age: Pliocene, 2.6 to 5.3 million years old. About 2 mi of the line.
Clay, silt, sand. Age: Pleistocene, less than 2.6 million years old. About 0.8 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit 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 Columbia City reaches the Pacific Ocean by way of the Columbia: about 80 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Columbia City; river miles along the main stem, rounded.
Columbia City has a warm-summer Mediterranean climate. Summer afternoons average 80° in August; winter nights fall to about 32° in January. About 52 inches of rain fall in a normal year, with about 1 inch of snow.
On November 14 Columbia City normally reaches 52° and falls to 36°. The record high is 71°, in 1995; the record low 9°, in 1955. The most rain on this date, 1.77 in, fell in 1942.
Normals 1991–2020 and records since 1928 at Battle Ground, 16 miles east-southeast, 230 ft higher. NOAA, through RCC-ACIS.
