The Ohio 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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68° on Nov. 12, 2020, the hottest reading for this week of the year since 1931. Next is 66° in 2012.
Ohio’s center stands about 2,410 ft above sea level. Within three miles the land runs from 1,980 ft to 2,640 ft, a difference of 660 ft: hilly country. The highest named summit within 15 miles is Kitty Cobble, about 3,230 ft, 12 miles east-northeast.
Under the town center the state geologic map shows Interlayered metasedimentary rock and granitic, charnockitic, mangeritic, or syenitic gneiss (metasedimentary, gneiss), from the Mesoproterozoic, 1 to 1.6 billion years old.
The section below crosses 4 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.
Gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 8 mi of the line.
Metasedimentary, gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 7 mi of the line.
Metasedimentary, migmatite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 5 mi of the line.
Gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 3 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 Ohio reaches Lake Ontario by way of the North Branch Black and the Black River: about 130 river miles. From the lake it goes down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Ohio; river miles along the main stem, rounded.
Ohio has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 7° in January. A normal year brings about 154 inches of snow; with the rain, that comes to about 50 inches of water.
Normals 1991–2020 and records since 1931 at Big Moose 3 SE, 17 miles north, 470 ft lower. NOAA, through RCC-ACIS.
