The Roosevelt 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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71° on Nov. 15, 2001, the hottest reading for this week of the year since 1893. Next is 70° in 1999.
Roosevelt’s center stands about 360 ft above sea level. Within three miles the land runs from 250 ft to 1,710 ft, a difference of 1,460 ft: steep hill country. The highest named summit within 15 miles is Turner Butte, about 1,270 ft, 11 miles south-southwest.
Under the town center the state geologic map shows Miocene volcanic rocks (basalt), from the Late Oligocene to Early Pliocene, 3.6 to 28 million years old.
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 8×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, siltstone, mudstone. Age: Miocene to Pliocene, 2.6 to 23 million years old. About 8 mi of the line.
Silt. Age: Pleistocene, less than 2.6 million years old. About 5 mi of the line.
Conglomerate, volcanic. Age: Middle Miocene to Pliocene, 2.6 to 16 million years old. About 4 mi of the line.
Basalt. Age: Late Oligocene to Early Pliocene, 3.6 to 28 million years old. About 3 mi of the line.
Basalt. Age: Middle Miocene to Late Miocene, 5.3 to 16 million years old. About 2 mi of the line.
Basalt. Age: Middle Miocene, 12 to 16 million years old. About 1 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 Roosevelt reaches the Pacific Ocean by way of Lake Umatilla and the Columbia: about 240 river miles.
Lake on the way: Lake Umatilla.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Roosevelt; river miles along the main stem, rounded.
Roosevelt has a cold semi-arid climate. Summer afternoons average 90° in July; winter nights fall to about 30° in January. A normal year brings about 5 inches of snow; with the rain, that comes to about 9 inches of water.
On November 14 Roosevelt normally reaches 51° and falls to 35°. The record high is 70°, in 1999; the record low 10°, in 1955. The most rain on this date, 0.76 in, fell in 1966.
Normals 1991–2020 and records since 1893 at Arlington, here. NOAA, through RCC-ACIS.
