The Gilchrist 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.
Mostly cloudy
Showers likely
Partly cloudy
Showers likely
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3.15 inches of rain fell in two days, the most for this week of the year since records began in 1974. The next wettest, 2.49 inches, fell in 2007.
Gilchrist’s center stands about 4,470 ft above sea level. Within three miles the land runs from 4,360 ft to 5,100 ft, a difference of 740 ft: hilly country. The highest named summit within 15 miles is Hamner Butte, about 7,090 ft, 8 miles 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 7×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Basaltic-andesite, basalt, andesite. Age: Miocene, 5.3 to 23 million years old. About 10 mi of the line.
Clay, silt, sand. Age: Pleistocene, less than 2.6 million years old. About 6 mi of the line.
Basalt. Age: Miocene to Pliocene, 2.6 to 23 million years old. About 5 mi of the line.
Basaltic-andesite, basalt. Age: Early Pliocene to Pleistocene, 1.2 to 3.9 million years old. About 2 mi of the line.
Rhyolite, dacite. Age: Early Miocene to Pliocene, 2.6 to 23 million years old. About 0.7 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 Gilchrist reaches the Pacific Ocean by way of the Little Deschutes, the Deschutes and the Columbia: about 450 river miles.
Lake on the way: Lake Billy Chinook.
200 miles of the trip are on the Columbia.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Gilchrist; river miles along the main stem, rounded.
Gilchrist has a dry-summer warm-summer continental climate. Summer afternoons average 74° in August; winter nights fall to about 20° in January. A normal year brings about 190 inches of snow; with the rain, that comes to about 34 inches of water.
On November 14 Gilchrist normally reaches 41° and falls to 26°. The record high is 58°, in 1999; the record low 8°, in 2022. The most rain on this date, 1.65 in, fell in 2014.
Normals 1991–2020 and records since 1974 at Odell Lake-East, 14 miles west-northwest, 340 ft higher. NOAA, through RCC-ACIS.
