The Gumbranch 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.
86° on Nov. 16, 1958, the hottest reading for this week of the year since 1941. Next is 85° in 1945.
Gumbranch’s center stands about 100 ft above sea level. Within three miles the land runs from 70 ft to 130 ft, a difference of 60 ft: nearly flat ground.
Under the town center the state geologic map shows Wicomico Shoreline Complex - marsh and lagoonal facies (fine-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 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: Pleistocene, less than 2.6 million years old. About 16 mi of the line.
Fine-detrital. Age: Pleistocene, less than 2.6 million years old. About 4 mi of the line.
Fine-detrital. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
Sand. 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 Gumbranch reaches the Atlantic Ocean by way of Little Horse Creek, Horse Creek, Taylors Creek, Canoochee Creek, the Canoochee and the Ogeechee: about 75 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Gumbranch; river miles along the main stem, rounded.
Gumbranch has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 41° in January. About 51 inches of rain fall in a normal year.
On November 14 Gumbranch normally reaches 71° and falls to 49°. The record high is 83°, in 1993; the record low 28°, in 1942. The most rain on this date, 0.78 in, fell in 1997.
Normals 1991–2020 and records since 1941 at Fort Stewart, 4 miles northeast. NOAA, through RCC-ACIS.