The Penn Forest 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
Partly cloudy; warmer
Partly cloudy
Mostly sunny
Sunny
Mostly sunny
Mostly sunny
72° on Nov. 11, 2020, the hottest reading for this week of the year since 1958. Next is 71° in 2012.
Penn Forest’s center stands about 1,640 ft above sea level. Within three miles the land runs from 1,080 ft to 1,960 ft, a difference of 880 ft: hilly country. The highest named summit within 15 miles is Pimple Hill, about 2,220 ft, 8 miles northeast.
Under the town center the state geologic map shows Duncannon Member of Catskill Formation (sandstone, siltstone), from the Late Devonian, 359 to 384 million years old.
The section below crosses 14 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 12×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, siltstone. Age: Late Devonian, 359 to 384 million years old. About 12 mi of the line.
Sandstone, siltstone, mudstone. Age: Late Devonian, 359 to 384 million years old. About 2 mi of the line.
Shale, siltstone. Age: Early Devonian to Middle Devonian, 384 to 422 million years old. About 2 mi of the line.
Sandstone, siltstone, mudstone. Age: Late Devonian, 359 to 384 million years old. About 2 mi of the line.
Sandstone. Age: Late Devonian, 359 to 384 million years old. About 1 mi of the line.
Conglomerate-sandstone, clastic. Age: Late Devonian, 359 to 384 million years old. About 0.9 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 8 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 Penn Forest reaches Delaware Bay and the Atlantic Ocean by way of Stony Creek, the Lehigh and the Delaware: about 210 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 Penn Forest; river miles along the main stem, rounded.
Penn Forest has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 16° in January. About 49 inches of rain fall in a normal year.
On November 14 Penn Forest normally reaches 48° and falls to 30°. The record high is 65°, in 1964; the record low 10°, in 1997. The most rain on this date, 0.91 in, fell in 1972.
Normals 1991–2020 and records since 1958 at Francis E Walter Dam, 12 miles north-northwest, 130 ft lower. NOAA, through RCC-ACIS.
