The Artois 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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24° on Nov. 13, 1985, the coldest reading for this week of the year since 1903. Next is 25° in 1978.
Artois’s center stands about 170 ft above sea level. Within three miles the land runs from 140 ft to 200 ft, a difference of 60 ft: nearly flat ground. The highest named summit within 15 miles is Orland Buttes, about 1,020 ft, 12 miles northwest.
Under the town center the state geologic map shows Quaternary alluvium and marine deposits (coarse-detrital), from the Pleistocene to Holocene, less than 2.6 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 29×. 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. Age: Pleistocene to Holocene, less than 2.6 million years old. About 16 mi of the line.
Sandstone, conglomerate. Age: Miocene to Pleistocene, less than 23 million years old. About 8 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 Artois reaches San Francisco Bay and the Pacific Ocean by way of Willow Creek, the Colusa Basin Drainage Canal and the Sacramento: about 160 river miles.
85 miles of the trip are on the Sacramento.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Artois; river miles along the main stem, rounded.
Artois has a hot-summer Mediterranean climate. Summer afternoons average 94° in July; winter nights fall to about 37° in December. About 21 inches of rain fall in a normal year.
On November 14 Artois normally reaches 66° and falls to 43°. The record high is 83°, in 2013; the record low 25°, in 1985. The most rain on this date, 2.26 in, fell in 1953.
Normals 1991–2020 and records since 1903 at Orland, 9 miles north. NOAA, through RCC-ACIS.
