The Lockeford 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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79° on Nov. 14, 1995, the hottest reading for this week of the year since 1893. Next is 79° in 2008.
Lockeford’s center stands about 110 ft above sea level. Within three miles the land runs from 60 ft to 150 ft, a difference of 90 ft: gently rolling country. The highest named summit within 15 miles is Buena Vista Peaks, about 820 ft, 15 miles east-northeast.
Under the town center the state geologic map shows Older Quaternary alluvium and marine deposits (coarse-detrital), from the Pleistocene, 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 53×. 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 12 mi of the line.
Sandstone, conglomerate. Age: Miocene to Pleistocene, less than 23 million years old. About 7 mi of the line.
Sandstone, conglomerate. Age: Oligocene to Pleistocene, less than 34 million years old. About 3 mi of the line.
Coarse-detrital. Age: Pleistocene, less than 2.6 million years old. About 2 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 Lockeford reaches San Francisco Bay and the Pacific Ocean by way of the San Joaquin and New York Slough: about 45 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Lockeford; river miles along the main stem, rounded.
Lockeford has a cold semi-arid climate. Summer afternoons average 96° in July; winter nights fall to about 38° in December. About 13 inches of rain fall in a normal year.
On November 14 Lockeford normally reaches 67° and falls to 43°. The record high is 79°, in 1995; the record low 29°, in 1916. The most rain on this date, 0.94 in, fell in 1972.
Normals 1991–2020 and records since 1893 from the Stockton Area threaded record (Stockton Airport, 19 miles south-southwest). NOAA, through RCC-ACIS.
