The Delmar 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.
Partly cloudy
Mostly sunny; warmer
Mostly sunny
Partly cloudy
Partly cloudy
Mostly sunny
Mostly sunny
4.05 inches of rain fell in two days, the most for this week of the year since records began in 1906. The next wettest, 3.40 inches, fell in 2009.
Delmar’s center stands about 50 ft above sea level. Within three miles the land runs from 40 ft to 110 ft, a difference of 70 ft: gently rolling country.
Under the town center the state geologic map shows Chesapeake Group (silt), from the Tertiary, 2.6 to 66 million 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.
Silt. Age: Tertiary, 2.6 to 66 million years old. About 12 mi of the line.
Fine-detrital, coarse-detrital. Age: Pleistocene, less than 2.6 million years old. About 12 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 Delmar reaches Chesapeake Bay and the Atlantic Ocean by way of Vena Gains Branch, Little Creek, Broad Creek and the Nanticoke: about 45 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Delmar; river miles along the main stem, rounded.
Delmar has a humid subtropical climate. Summer afternoons average 88° in July; winter nights fall to about 28° in January. A normal year brings about 8 inches of snow; with the rain, that comes to about 48 inches of water.
On November 14 Delmar normally reaches 59° and falls to 38°. The record high is 77°, in 1993; the record low 20°, in 2019. The most rain on this date, 1.40 in, fell in 1995.
Normals 1991–2020 and records since 1906 from the Salisbury Area threaded record (Salisbury-Wicomico Regional Airport, 9 miles south). NOAA, through RCC-ACIS.
