The Coupeville 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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70° on Nov. 13, 2013, the hottest reading for this week of the year since 1945. Next is 65° in 1990.
Coupeville’s center stands about 50 ft above sea level. Within three miles the land runs from 0 ft to 300 ft, a difference of 300 ft: rolling country. Open water lies within three miles. The highest named summit within 15 miles is Mount High-G, about 760 ft, 14 miles north.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 37×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Fine-detrital, coarse-detrital. Age: Pleistocene, less than 2.6 million years old. About 6 mi of the line.
Sand, gravel. Age: Pleistocene, less than 2.6 million years old. About 4 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 Coupeville runs straight into the Pacific Ocean.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Coupeville; river miles along the main stem, rounded.
Coupeville has a warm-summer Mediterranean climate. Summer afternoons average 70° in August; winter nights fall to about 37° in February. A normal year brings about 5 inches of snow; with the rain, that comes to about 20 inches of water.
On November 14 Coupeville normally reaches 54° and falls to 41°. The record high is 66°, in 2013; the record low 11°, in 1955. The most rain on this date, 0.70 in, fell in 2015.
Normals 1991–2020 and records since 1945 at Whidbey Island Nas, 9 miles north. NOAA, through RCC-ACIS.
