The Heathsville 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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4.56 inches of rain fell in two days, the most for this week of the year since records began in 1893. The next wettest, 3.47 inches, fell in 2020.
Heathsville’s center stands about 110 ft above sea level. Within three miles the land runs from 10 ft to 160 ft, a difference of 150 ft: gently rolling country.
Under the town center the state geologic map shows Windsor Formation (fine-detrital, coarse-detrital), from the Tertiary to Quaternary, less than 66 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, coarse-detrital. Age: Tertiary to Quaternary, less than 66 million years old. About 14 mi of the line.
Sand. Age: Quaternary, less than 2.6 million years old. About 0.8 mi of the line.
Sand. Age: Tertiary, 2.6 to 66 million years old. About 0.7 mi of the line.
Sand, silt. Age: Quaternary, less than 2.6 million years old. About 0.5 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 Heathsville reaches Chesapeake Bay and the Atlantic Ocean by way of the Crabbe Mill Stream and the Great Wicomico: about 14 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Heathsville; river miles along the main stem, rounded.
Heathsville has a humid subtropical climate. Summer afternoons average 88° in July; winter nights fall to about 28° in January. A normal year brings about 12 inches of snow; with the rain, that comes to about 45 inches of water.
On November 14 Heathsville normally reaches 60° and falls to 39°. The record high is 82°, in 1941; the record low 16°, in 1920. The most rain on this date, 2.10 in, fell in 1926.
Normals 1991–2020 and records since 1893 at Warsaw 2 NW, 17 miles west-northwest. NOAA, through RCC-ACIS.
