The Rolling Hills 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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96° on Nov. 13, 1933, the hottest reading for this week of the year since 1877. Next is 94° in 1900.
Rolling Hills’s center stands about 1,130 ft above sea level. Within three miles the land runs from 40 ft to 1,340 ft, a difference of 1,300 ft: steep hill country. Open water lies within three miles. The highest named summit within 15 miles is San Pedro Hill, about 1,480 ft, 1 miles southeast.
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 13×. 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, less than 2.6 million years old. About 9 mi of the line.
Sandstone, mudstone. Age: Oligocene to Pliocene, 2.6 to 34 million years old. About 6 mi of the line.
Schist, metasedimentary. Age: Early Cretaceous to Late Cretaceous, 95 to 112 million years old. About 0.8 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.
Rain that falls on Rolling Hills runs straight into the Pacific Ocean.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Rolling Hills; river miles along the main stem, rounded.
Rolling Hills has a hot semi-arid climate. Summer afternoons average 84° in August; winter nights fall to about 48° in December. About 14 inches of rain fall in a normal year.
On November 14 Rolling Hills normally reaches 73° and falls to 54°. The record high is 93°, in 1933; the record low 36°, in 1880. The most rain on this date, 1.33 in, fell in 1928.
Normals 1991–2020 and records since 1877 from the Los Angeles Downtown Area threaded record (Los Angeles Downtown, 22 miles north-northeast, 750 ft lower). NOAA, through RCC-ACIS.
