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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Mostly sunny; warmer
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−1° on Nov. 12, 2019, the coldest reading for this week of the year since 1893. Next is 0° in 1996.
Ohio’s center stands about 890 ft above sea level. Within three miles the land runs from 750 ft to 930 ft, a difference of 180 ft: gently rolling country.
Under the town center the state geologic map shows Silurian System undivided (dolostone, limestone), from the Silurian, 422 to 445 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Dolostone, limestone. Age: Silurian, 422 to 445 million years old. About 15 mi of the line.
Shale, sandstone. Age: Early Pennsylvanian to Middle Pennsylvanian, 307 to 324 million years old. About 8 mi of the line.
Shale, limestone. Age: Late Ordovician, 445 to 454 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 Ohio reaches the Gulf of America by way of Lime Creek, West Bureau Creek, Big Bureau Creek, the Illinois and the Mississippi: about 1,440 river miles.
Lake on the way: Peoria Lake.
1,190 miles of the trip are on the Mississippi.
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 hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 13° in January. A normal year brings about 36 inches of snow; with the rain, that comes to about 37 inches of water.
On November 14 Ohio normally reaches 48° and falls to 30°. The record high is 74°, in 1999; the record low 0°, in 1996. The most rain on this date, 1.83 in, fell in 1926.
Normals 1991–2020 and records since 1893 at Walnut, 7 miles west, 190 ft lower. NOAA, through RCC-ACIS.
