The St. Simons 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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Partly cloudy
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29° on Nov. 15, 1969, the coldest reading for this week of the year since 1940. Next is 32° in 1970.
St. Simons’s center stands about 16 ft above sea level. Within three miles the land runs from 0 ft to 70 ft, a difference of 70 ft: gently rolling country. Open water lies within three miles.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Fine-detrital. Age: Holocene, less than 12,000 years old. About 4 mi of the line.
Sand. Age: Pleistocene, less than 2.6 million years old. About 3 mi of the line.
Sand. Age: Pleistocene, less than 2.6 million years old. About 3 mi of the line.
Sand. Age: Pleistocene, less than 2.6 million years old. About 0.8 mi of the line.
Fine-detrital. Age: Pleistocene, less than 2.6 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.
A raindrop that lands in St. Simons reaches the Atlantic Ocean by way of Dunbar Creek: about 10 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of St. Simons; river miles along the main stem, rounded.
St. Simons has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 44° in January. About 45 inches of rain fall in a normal year.
On November 14 St. Simons normally reaches 71° and falls to 53°. The record high is 85°, in 1955; the record low 33°, in 1984. The most rain on this date, 1.93 in, fell in 1970.
Normals 1991–2020 and records since 1940 at Brunswick-Mckinnon Airport, here. NOAA, through RCC-ACIS.
