The Okahumpka 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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88° on Nov. 12, 2015, the hottest reading for this week of the year since 1958. Next is 87° in 2002.
Okahumpka’s center stands about 110 ft above sea level. Within three miles the land runs from 60 ft to 140 ft, a difference of 80 ft: gently rolling country. The highest named summit within 15 miles is Sugarloaf Mountain, about 320 ft, 12 miles southeast.
Under the town center the state geologic map shows Cypresshead Formation (sand), from the Late Pliocene, 2.6 to 3.6 million years old.
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 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. Age: Late Pliocene, 2.6 to 3.6 million years old. About 13 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 7 mi of the line.
Sand, clay. Age: Pliocene to Pleistocene, less than 5.3 million 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.
A raindrop that lands in Okahumpka reaches the St. Johns River and the Atlantic Ocean by way of Helena Run, Haines Creek, Haynes Creek, the Ocklawaha and Trout Creek: about 200 river miles.
Lakes on the way: Lake Ocklawaha and Eustis, Lake.
100 miles of the trip are on Trout Creek.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Okahumpka; river miles along the main stem, rounded.
Okahumpka has a humid subtropical climate. Summer afternoons average 92° in August; winter nights fall to about 49° in January. About 44 inches of rain fall in a normal year.
On November 14 Okahumpka normally reaches 77° and falls to 57°. The record high is 87°, in 2018; the record low 33°, in 1963. The most rain on this date, 2.20 in, fell in 1972.
Normals 1991–2020 and records since 1958 from the Leesburg Area threaded record (Leesburg Municipal Airport, 7 miles northeast). NOAA, through RCC-ACIS.
