The Chinook 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.
Showers likely
Showers likely
Showers likely
Chance of showers
Chance of showers
Partly cloudy
Chance of showers
5.39 inches of rain fell in two days, the most for this week of the year since records began in 1887. The next wettest, 5.30 inches, fell in 2015.
Chinook’s center stands about 20 ft above sea level. Within three miles the land runs from 0 ft to 1,080 ft, a difference of 1,080 ft: steep hill country. Open water lies within three miles. The highest named summit within 15 miles is Altoona Hill, about 1,190 ft, 15 miles east.
Under the town center the state geologic map shows Alluvium (silt, sand), from the Holocene, less than 12,000 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 13×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, siltstone. Age: Middle Eocene to Early Miocene, 16 to 48 million years old. About 3 mi of the line.
Sandstone. Age: Early Eocene to Middle Eocene, 38 to 56 million years old. About 3 mi of the line.
Sandstone, siltstone. Age: Miocene, 5.3 to 23 million years old. About 3 mi of the line.
Sandstone, conglomerate, conglomerate-sandstone. Age: Late Eocene to Miocene, 5.3 to 38 million years old. About 1 mi of the line.
Silt, sand. Age: Holocene, less than 12,000 years old. About 1 mi of the line.
Sand. Age: Holocene, less than 12,000 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. 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 Chinook reaches the Pacific Ocean by way of the Chinook and the Columbia: about 11 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Chinook; river miles along the main stem, rounded.
Chinook has a warm-summer Mediterranean climate. Summer afternoons average 69° in August; winter nights fall to about 37° in February. About 70 inches of rain fall in a normal year.
On November 14 Chinook normally reaches 54° and falls to 40°. The record high is 64°, in 2001; the record low 15°, in 1955. The most rain on this date, 2.78 in, fell in 2015.
Normals 1991–2020 and records since 1887 from the Astoria Area threaded record (Astoria Airport (Port Of), 9 miles south-southeast). NOAA, through RCC-ACIS.
