The Bellevue 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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67° on Nov. 13, 2016, the hottest reading for this week of the year since 1958. Next is 66° in 1999.
Bellevue’s center stands about 5,200 ft above sea level. Within three miles the land runs from 5,090 ft to 7,490 ft, a difference of 2,400 ft: mountain country. The highest named summit within 15 miles is Bald Mountain, about 9,110 ft, 15 miles north-northwest.
The section below crosses 5 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.
Age: Carboniferous to Permian, 252 to 324 million years old. About 7 mi of the line.
Gravel, sand, silt. Age: Pliocene to Pleistocene, less than 5.3 million years old. About 5 mi of the line.
Dolostone, limestone, sandstone. Age: Ordovician to Devonian, 359 to 487 million years old. About 5 mi of the line.
Gravel, sand, silt. Age: Quaternary, less than 2.6 million years old. About 4 mi of the line.
Rhyolite. Age: Middle Miocene to Late Miocene, 8 to 14 million years old. About 3 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 Bellevue reaches the Pacific Ocean by way of the Big Wood, the Malad, the Snake and the Columbia: about 980 river miles.
Lakes on the way: Lake Umatilla, Brownlee Reservoir, Cove Arm Lake and Magic Reservoir.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Bellevue; river miles along the main stem, rounded.
Bellevue has a dry-summer warm-summer continental climate. Summer afternoons average 87° in July; winter nights fall to about 7° in January. A normal year brings about 46 inches of snow; with the rain, that comes to about 13 inches of water.
On November 14 Bellevue normally reaches 45° and falls to 19°. The record high is 65°, in 1999; the record low −4°, in 1964. The most rain on this date, 1.00 in, fell in 2020.
Normals 1991–2020 and records since 1958 at Picabo, 15 miles southeast, 360 ft lower. NOAA, through RCC-ACIS.
