The Red Bluff 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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87° on Nov. 14, 1995, the hottest reading for this week of the year since 1933. Next is 86° in 2019.
Red Bluff’s center stands about 310 ft above sea level. Within three miles the land runs from 240 ft to 430 ft, a difference of 190 ft: gently rolling country. The highest named summit within 15 miles is Tuscan Buttes, about 1,810 ft, 10 miles northeast.
Under the town center the state geologic map shows Plio-Pleistocene and Pliocene loosely consolidated deposits (sandstone, conglomerate), from the Miocene to Pleistocene, less than 23 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 21×. 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, conglomerate. Age: Miocene to Pleistocene, less than 23 million years old. About 13 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 6 mi of the line.
Andesite. Age: Late Oligocene to Pleistocene, 2 to 24 million years old. About 5 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 Red Bluff reaches San Francisco Bay and the Pacific Ocean by way of Brickyard Creek and the Sacramento: about 240 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Red Bluff; river miles along the main stem, rounded.
Red Bluff has a hot-summer Mediterranean climate. Summer afternoons average 98° in July; winter nights fall to about 38° in January. About 23 inches of rain fall in a normal year.
On November 14 Red Bluff normally reaches 65° and falls to 43°. The record high is 87°, in 1995; the record low 25°, in 1985. The most rain on this date, 1.39 in, fell in 1954.
Normals 1991–2020 and records since 1933 at Red Bluff Municipal Airport, here. NOAA, through RCC-ACIS.
