The Forbestown 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.
Partly cloudy
Showers likely
Showers likely
Mostly sunny
Showers likely
Showers likely
Chance of showers
80° on Nov. 14, 1995, the hottest reading for this week of the year since 1948. Next is 77° in 1949.
Forbestown’s center stands about 2,810 ft above sea level. Within three miles the land runs from 1,070 ft to 3,280 ft, a difference of 2,210 ft: mountain country. The highest named summit within 15 miles is Whiskey Hill, about 4,680 ft, 14 miles north-northeast.
Under the town center the state geologic map shows Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains) (mafic-volcanic), from the Jurassic, 145 to 202 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 5×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Granodiorite. Age: Permian to Tertiary, 2.6 to 260 million years old. About 7 mi of the line.
Mafic-volcanic. Age: Jurassic, 145 to 202 million years old. About 5 mi of the line.
Andesite, basalt. Age: Late Oligocene to Pleistocene, 2 to 24 million years old. About 4 mi of the line.
Diorite, gabbro. Age: Triassic to Cretaceous, 66 to 252 million years old. About 4 mi of the line.
Peridotite, serpentinite. Age: Neoproterozoic to Early Jurassic, 175 to 1,000 million years old. About 3 mi of the line.
Sandstone. Age: Eocene, 34 to 56 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 Forbestown reaches San Francisco Bay and the Pacific Ocean by way of the South Fork Feather, the Feather and the Sacramento: about 170 river miles.
75 miles of the trip are on the Sacramento.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Forbestown; river miles along the main stem, rounded.
Forbestown has a warm-summer Mediterranean climate. Summer afternoons average 85° in July; winter nights fall to about 30° in January. A normal year brings about 82 inches of snow; with the rain, that comes to about 82 inches of water.
On November 14 Forbestown normally reaches 58° and falls to 34°. The record high is 80°, in 1995; the record low 18°, in 1985. The most rain on this date, 5.28 in, fell in 1963.
Normals 1991–2020 and records since 1948 at Strawberry Valley 2, 6 miles east, 900 ft higher. NOAA, through RCC-ACIS.
