The Weippe 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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−5° on Nov. 16, 2022, the coldest reading for this week of the year since 1963. Next is −2° in 2014.
Weippe’s center stands about 3,030 ft above sea level. Within three miles the land runs from 2,540 ft to 3,270 ft, a difference of 730 ft: hilly country. The highest named summit within 15 miles is French Mountain, about 5,350 ft, 14 miles northeast.
Under the town center the state geologic map shows Columbia River Basalt Group (basalt, basaltic-andesite), from the Early Miocene to Late Miocene, 6 to 18 million years old.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 6×. 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, basaltic-andesite. Age: Early Miocene to Late Miocene, 6 to 18 million years old. About 10 mi of the line.
Quartz-diorite. Age: Late Jurassic to Late Cretaceous, 90 to 160 million years old. About 3 mi of the line.
Granodiorite, granite. Age: Late Cretaceous to Early Eocene, 54 to 66 million years old. About 3 mi of the line.
Tonalite, granodiorite, quartz-diorite. Age: Late Cretaceous, 70 to 100 million years old. About 3 mi of the line.
Quartzite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 2 mi of the line.
Granodiorite, tonalite, quartz-diorite. Age: Late Jurassic to Late Cretaceous, 87 to 160 million years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 2 smaller units 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 Weippe reaches the Pacific Ocean by way of Jim Ford Creek, the Clearwater, the Snake and the Columbia: about 520 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 Weippe; river miles along the main stem, rounded.
Weippe has a dry-summer warm-summer continental climate. Summer afternoons average 83° in July; winter nights fall to about 18° in January. A normal year brings about 114 inches of snow; with the rain, that comes to about 43 inches of water.
On November 14 Weippe normally reaches 42° and falls to 25°. The record high is 67°, in 1999; the record low 2°, in 1978. The most rain on this date, 0.77 in, fell in 1987.
Normals 1991–2020 and records since 1963 at Pierce, 10 miles northeast. NOAA, through RCC-ACIS.
