The Leavenworth 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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3.44 inches of rain fell in two days, the most for this week of the year since records began in 1914. The next wettest, 2.58 inches, fell in 2003.
Leavenworth’s center stands about 1,170 ft above sea level. Within three miles the land runs from 1,070 ft to 4,300 ft, a difference of 3,230 ft: mountain country. The highest named summit within 15 miles is Mount Stuart, about 9,180 ft, 14 miles southwest.
Under the town center the state geologic map shows Younger glacial drift (fine-detrital, coarse-detrital), from the Pleistocene, less than 2.6 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 3×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Granite. Age: Precambrian to Eocene. About 11 mi of the line.
Arkose. Age: Late Cretaceous to Eocene, 34 to 100 million years old. About 7 mi of the line.
Gneiss. Age: Precambrian to Eocene. About 3 mi of the line.
Fine-detrital, coarse-detrital. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
Gravel, sand. Age: Pleistocene, less than 2.6 million years old. About 0.5 mi of the line.
Silt, sand. Age: Holocene, less than 12,000 years old. About 0.4 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.
A raindrop that lands in Leavenworth reaches the Pacific Ocean by way of the Wenatchee and the Columbia: about 490 river miles.
Lake on the way: Lake Umatilla.
210 miles of the trip are on the Columbia.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Leavenworth; river miles along the main stem, rounded.
Leavenworth has a dry-summer warm-summer continental climate. Summer afternoons average 87° in July; winter nights fall to about 19° in January. A normal year brings about 80 inches of snow; with the rain, that comes to about 26 inches of water.
On November 14 Leavenworth normally reaches 44° and falls to 27°. The record high is 69°, in 2021; the record low 0°, in 1955. The most rain on this date, 0.98 in, fell in 1941.
Normals 1991–2020 and records since 1914 at Leavenworth 3 S, 3 miles south-southwest. NOAA, through RCC-ACIS.
