The Neahkahnie 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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7.62 inches of rain fell in two days, the most for this week of the year since records began in 1930. The next wettest, 4.84 inches, fell in 2001.
Neahkahnie’s center stands about 210 ft above sea level. Within three miles the land runs from 0 ft to 1,650 ft, a difference of 1,650 ft: steep hill country. Open water lies within three miles. The highest named summit within 15 miles is Onion Peak, about 2,930 ft, 6 miles north-northeast.
Under the town center the state geologic map shows Marine sedimentary and tuffaceous rocks (sandstone, siltstone), from the Late Eocene to Early Miocene, 16 to 38 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 7×. 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 8 mi of the line.
Siltstone, sandstone. Age: Early Miocene to Middle Miocene, 12 to 23 million years old. About 2 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 1 mi of the line.
Sandstone, siltstone. Age: Late Eocene to Early Miocene, 16 to 38 million years old. About 0.5 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.
Rain that falls on Neahkahnie runs straight into the Pacific Ocean.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Neahkahnie; river miles along the main stem, rounded.
Neahkahnie has a warm-summer Mediterranean climate. Summer afternoons average 67° in September; winter nights fall to about 38° in February. About 77 inches of rain fall in a normal year.
On November 14 Neahkahnie normally reaches 55° and falls to 42°. The record high is 68°, in 1995; the record low 14°, in 1955. The most rain on this date, 4.72 in, fell in 2015.
Normals 1991–2020 and records since 1930 at Seaside, 18 miles north, 200 ft lower. NOAA, through RCC-ACIS.
