The Chubbuck 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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−13° on Nov. 16, 1955, the coldest reading for this week of the year since 1939. Next is −6° in 1978.
Chubbuck’s center stands about 4,470 ft above sea level. Within three miles the land runs from 4,400 ft to 4,920 ft, a difference of 520 ft: hilly country. The highest named summit within 15 miles is Indian Mountain, about 7,260 ft, 14 miles south-southeast.
Under the town center the state geologic map shows Lake Bonneville deposits (coarse-detrital, fine-detrital), from the Pleistocene to Holocene, less than 33,000 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 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.
Coarse-detrital, fine-detrital. Age: Pleistocene to Holocene, less than 33,000 years old. About 10 mi of the line.
Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 5 mi of the line.
Sand. Age: Quaternary, less than 2.6 million years old. About 4 mi of the line.
Limestone, dolostone. Age: Cambrian to Ordovician, 445 to 542 million years old. About 2 mi of the line.
Gravel, sand, silt. Age: Quaternary, less than 2.6 million years old. About 2 mi of the line.
Gravel. Age: Quaternary, less than 2.6 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.
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 Chubbuck reaches the Pacific Ocean by way of American Falls Reservoir, the Snake and the Columbia: about 1,060 river miles.
Lakes on the way: American Falls Reservoir, Lake Umatilla, Brownlee Reservoir and Cove Arm Lake.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Chubbuck; river miles along the main stem, rounded.
Chubbuck has a cold semi-arid climate. Summer afternoons average 89° in July; winter nights fall to about 17° in January. A normal year brings about 38 inches of snow; with the rain, that comes to about 12 inches of water.
On November 14 Chubbuck normally reaches 47° and falls to 24°. The record high is 66°, in 2016; the record low −2°, in 1978. The most rain on this date, 0.66 in, fell in 1971.
Normals 1991–2020 and records since 1939 from the Pocatello Area threaded record (Pocatello Regional Airport, 5 miles west). NOAA, through RCC-ACIS.
