The Sawgrass 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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4.44 inches of rain fell in two days, the most for this week of the year since records began in 1944. The next wettest, 2.62 inches, fell in 2019.
Sawgrass’s center stands about 13 ft above sea level. Within three miles the land runs from 0 ft to 60 ft, a difference of 60 ft: nearly flat ground. Open water lies within three miles.
Under the town center the state geologic map shows Holocene sediments (sand), from the Holocene, less than 12,000 years old.
The section below crosses 2 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.
Sand, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 8 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 5 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 Sawgrass runs straight into the St. Johns River and the Atlantic Ocean.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Sawgrass; river miles along the main stem, rounded.
Sawgrass has a humid subtropical climate. Summer afternoons average 89° in July; winter nights fall to about 49° in January. About 52 inches of rain fall in a normal year.
On November 14 Sawgrass normally reaches 73° and falls to 60°. The record high is 84°, in 2018; the record low 32°, in 1968. The most rain on this date, 4.35 in, fell in 2001.
Normals 1991–2020 and records since 1944 at Jacksonville Beach, 7 miles north. NOAA, through RCC-ACIS.
