The Lake Roesiger 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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26° on Nov. 15, 2014, the coldest reading for this week of the year since 1948. Next is 27° in 2000.
Lake Roesiger’s center stands about 810 ft above sea level. Within three miles the land runs from 300 ft to 1,110 ft, a difference of 810 ft: hilly country. The highest named summit within 15 miles is Mount Pilchuck, about 5,260 ft, 8 miles northeast.
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 5×. 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 7 mi of the line.
Silt, sand. Age: Holocene, less than 12,000 years old. About 5 mi of the line.
Argillite, graywacke. Age: Late Jurassic to Early Cretaceous, 100 to 164 million years old. About 5 mi of the line.
Fine-detrital, coarse-detrital. Age: Pleistocene, less than 2.6 million years old. About 3 mi of the line.
Arkose. Age: Late Cretaceous to Eocene, 34 to 100 million years old. About 2 mi of the line.
Metasedimentary. Age: Devonian to Permian, 273 to 422 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 Lake Roesiger reaches Puget Sound and the Pacific Ocean by way of Roesiger Creek, Woods Creek, the Skykomish and the Snohomish: about 40 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Lake Roesiger; river miles along the main stem, rounded.
Lake Roesiger has a warm-summer Mediterranean climate. Summer afternoons average 73° in August; winter nights fall to about 36° in December. About 33 inches of rain fall in a normal year.
On November 14 Lake Roesiger normally reaches 50° and falls to 40°. The record high is 60°, in 2021; the record low 28°, in 2014. The most rain on this date, 1.51 in, fell in 2015.
Normals 1991–2020 and records since 1948 at Everett Snohomish County Airport, 17 miles west-southwest, 260 ft lower. NOAA, through RCC-ACIS.
