The Harrisburg 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
Sunny; warmer
Mostly sunny
Mostly sunny
Mostly sunny; cooler
Partly cloudy
Showers likely
−21° on Nov. 13, 2014, the coldest reading for this week of the year since 1911. Next is −12° in 1986.
Harrisburg’s center stands about 4,490 ft above sea level. Within three miles the land runs from 4,410 ft to 4,960 ft, a difference of 550 ft: hilly country. The highest named summit within 15 miles is Hogback Mountain, about 5,040 ft, 8 miles north.
Under the town center the state geologic map shows White River Group (clay), from the Early Oligocene to Late Oligocene, 23 to 34 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 18×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Clay. Age: Early Oligocene to Late Oligocene, 23 to 34 million years old. About 17 mi of the line.
Siltstone-mudstone, conglomerate-sandstone. Age: Miocene, 5.3 to 23 million years old. About 7 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.
Harrisburg has a cold semi-arid climate. Summer afternoons average 88° in July; winter nights fall to about 14° in January. A normal year brings about 47 inches of snow; with the rain, that comes to about 16 inches of water.
On November 14 Harrisburg normally reaches 52° and falls to 21°. The record high is 75°, in 1999; the record low −19°, in 2014. The most rain on this date, 0.52 in, fell in 2008.
Normals 1991–2020 and records since 1911 at Harrisburg 12 WNW, 12 miles west-northwest. NOAA, through RCC-ACIS.
