The Harmony 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. 11, 2020, the hottest reading for this week of the year since 1921. Next is 72° in 2012.
Harmony’s center stands about 1,550 ft above sea level. Within three miles the land runs from 1,060 ft to 1,780 ft, a difference of 720 ft: hilly country. The highest named summit within 15 miles is Cole Hill, about 1,980 ft, 14 miles north.
Under the town center the state geologic map shows Shenango Formation through Cuyahoga Group, undivided (sandstone, siltstone), from the Carboniferous, 324 to 359 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 24×. 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. Age: Carboniferous, 299 to 324 million years old. About 8 mi of the line.
Sandstone, siltstone. Age: Carboniferous, 324 to 359 million years old. About 8 mi of the line.
Sandstone, shale. Age: Late Devonian, 359 to 384 million years old. About 4 mi of the line.
Sandstone. Age: Carboniferous, 324 to 359 million years old. About 3 mi of the line.
Siltstone, shale. Age: Carboniferous, 324 to 359 million years old. About 2 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 Harmony reaches the Gulf of America by way of McArthur Run, West Hickory Creek, the Allegheny, the Ohio and the Mississippi: about 2,110 river miles.
970 miles of the trip are on the Ohio.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Harmony; river miles along the main stem, rounded.
Harmony has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 19° in January. A normal year brings about 51 inches of snow; with the rain, that comes to about 47 inches of water.
On November 14 Harmony normally reaches 51° and falls to 33°. The record high is 71°, in 1989; the record low 12°, in 1986. The most rain on this date, 0.86 in, fell in 1997.
Normals 1991–2020 and records since 1921 at Tionesta 2 SE Lake, 7 miles south, 350 ft lower. NOAA, through RCC-ACIS.
