The Rock Hill 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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Mostly sunny; warmer
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74° on Nov. 11, 2020, the hottest reading for this week of the year since 1898. Next is 70° in 1956.
Rock Hill’s center stands about 1,390 ft above sea level. Within three miles the land runs from 1,070 ft to 1,650 ft, a difference of 580 ft: hilly country. The highest named summit within 15 miles is High Point, about 2,250 ft, 14 miles east-northeast.
Under the town center the state geologic map shows Lower Walton Formation (sandstone, conglomerate, shale), from the Late Devonian, 359 to 384 million years old.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 15×. 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, conglomerate, shale. Age: Late Devonian, 359 to 384 million years old. About 9 mi of the line.
Shale, sandstone, conglomerate. Age: Late Devonian, 359 to 384 million years old. About 7 mi of the line.
Shale. Age: Middle Devonian to Late Devonian, 359 to 394 million years old. About 4 mi of the line.
Shale, siltstone, sandstone. Age: Middle Devonian, 384 to 394 million years old. About 3 mi of the line.
Limestone. Age: Early Devonian, 394 to 422 million years old. About 0.5 mi of the line.
Shale, sandstone, conglomerate. Age: Silurian, 422 to 428 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. 2 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 Rock Hill reaches Delaware Bay and the Atlantic Ocean by way of the Neversink, Basher Kill and the Delaware: about 250 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Rock Hill; river miles along the main stem, rounded.
Rock Hill has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 13° in January. A normal year brings about 70 inches of snow; with the rain, that comes to about 53 inches of water.
On November 14 Rock Hill normally reaches 47° and falls to 29°. The record high is 66°, in 1964; the record low 6°, in 1986. The most rain on this date, 1.60 in, fell in 1911.
Normals 1991–2020 and records since 1898 at Liberty 1 NE, 14 miles north-northwest, 190 ft higher. NOAA, through RCC-ACIS.
