The Tancred 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.
Mostly sunny
Showers likely
Showers likely
Chance of showers
Showers likely
Showers likely
Partly cloudy
27° on Nov. 14, 2022, the coldest reading for this week of the year since 1970. Next is 28° in 1978.
Tancred’s center stands about 300 ft above sea level. Within three miles the land runs from 280 ft to 1,680 ft, a difference of 1,400 ft: steep hill country. The highest named summit within 15 miles is Berryessa Peak, about 3,010 ft, 7 miles south-southwest.
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 4 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. Age: Pleistocene to Holocene, less than 2.6 million years old. About 8 mi of the line.
Sandstone, siltstone-mudstone. Age: Late Cretaceous, 66 to 100 million years old. About 8 mi of the line.
Sandstone, conglomerate. Age: Miocene to Pleistocene, less than 23 million years old. About 7 mi of the line.
Mudstone, sandstone. Age: Paleocene to Oligocene, 23 to 66 million years old. About 0.6 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 Tancred reaches San Francisco Bay and the Pacific Ocean by way of Cache Creek, Prospect Slough, Cache Slough and the Sacramento: about 90 river miles.
70 miles of the trip are on Cache Creek.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Tancred; river miles along the main stem, rounded.
Tancred has a hot-summer Mediterranean climate. Summer afternoons average 95° in July; winter nights fall to about 36° in January. About 28 inches of rain fall in a normal year.
On November 14 Tancred normally reaches 67° and falls to 41°. The record high is 81°, in 1995; the record low 27°, in 2022. The most rain on this date, 2.58 in, fell in 1972.
Normals 1991–2020 and records since 1970 at Markley Cove, 19 miles south, 180 ft higher. NOAA, through RCC-ACIS.
