The North Whitehall 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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77° on Nov. 15, 1993, the hottest reading for this week of the year since 1912. Next is 74° in 1973.
North Whitehall’s center stands about 630 ft above sea level. Within three miles the land runs from 370 ft to 880 ft, a difference of 510 ft: hilly country. The highest named summit within 15 miles is Bear Mountain, about 1,670 ft, 15 miles north-northwest.
Under the town center the state geologic map shows Martinsburg Formation (shale, slate), from the Ordovician, 445 to 487 million years old.
The section below crosses 9 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 14×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, slate. Age: Ordovician, 445 to 487 million years old. About 8 mi of the line.
Dolostone, limestone. Age: Cambrian, 487 to 542 million years old. About 5 mi of the line.
Limestone. Age: Ordovician, 445 to 487 million years old. About 3 mi of the line.
Limestone, dolostone. Age: Ordovician, 445 to 487 million years old. About 3 mi of the line.
Shale. Age: Ordovician, 445 to 487 million years old. About 3 mi of the line.
Sandstone, conglomerate. Age: Silurian, 422 to 445 million years old. About 0.8 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 3 smaller units along the line are not listed.
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 North Whitehall reaches Delaware Bay and the Atlantic Ocean by way of Coplay Creek, the Lehigh and the Delaware: about 180 river miles.
150 miles of the trip are on the Delaware.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of North Whitehall; river miles along the main stem, rounded.
North Whitehall has a hot-summer humid continental climate. Summer afternoons average 86° in July; winter nights fall to about 22° in January. A normal year brings about 33 inches of snow; with the rain, that comes to about 47 inches of water.
On November 14 North Whitehall normally reaches 54° and falls to 34°. The record high is 73°, in 1993; the record low 17°, in 1986. The most rain on this date, 2.41 in, fell in 1972.
Normals 1991–2020 and records since 1912 from the Allentown Area threaded record (Allentown Lehigh Valley International Airport, 7 miles east-southeast, 240 ft lower). NOAA, through RCC-ACIS.
