The Lake Kathryn 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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8.00 inches of rain fell in two days, the most for this week of the year since records began in 1892. The next wettest, 6.05 inches, fell in 1916.
Lake Kathryn’s center stands about 60 ft above sea level. Within three miles the land runs from 30 ft to 90 ft, a difference of 60 ft: nearly flat ground.
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 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.
Sand. Age: Late Pliocene, 2.6 to 3.6 million years old. About 16 mi of the line.
Sand, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 5 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Sand, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 1 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 Lake Kathryn reaches the St. Johns River and the Atlantic Ocean by way of Black Water Creek, the Wekiva, Blue Creek and Trout Creek: about 190 river miles.
Lake on the way: George, 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 Lake Kathryn; river miles along the main stem, rounded.
Lake Kathryn has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 44° in January. About 56 inches of rain fall in a normal year.
On November 14 Lake Kathryn normally reaches 76° and falls to 54°. The record high is 87°, in 2018; the record low 29°, in 1906. The most rain on this date, 2.40 in, fell in 1941.
Normals 1991–2020 and records since 1892 at Deland 1 SSE, 12 miles east. NOAA, through RCC-ACIS.
