The Grand River 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.
Mostly cloudy
Mostly cloudy
Mostly cloudy
Sunny
Mostly sunny
Partly cloudy
Partly cloudy
75° on Nov. 11, 2020, the hottest reading for this week of the year since 1950. Next is 73° in 1989.
Grand River’s center stands about 610 ft above sea level. Within three miles the land runs from 560 ft to 730 ft, a difference of 170 ft: gently rolling country. The highest named summit within 15 miles is Wooddin Hill, about 1,340 ft, 11 miles southeast.
Under the town center the state geologic map shows Ohio Shale (shale, black-shale), from the Devonian, 359 to 422 million 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 25×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, black-shale. Age: Devonian, 359 to 422 million years old. About 9 mi of the line.
Shale, siltstone, sandstone. Age: Devonian to Carboniferous, 324 to 422 million years old. About 3 mi of the line.
Sandstone, shale. Age: Devonian, 359 to 422 million years old. About 0.8 mi of the line.
Shale, siltstone. Age: Carboniferous, 299 to 324 million years old. About 0.4 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 Grand River reaches Lake Erie by way of the Grand River: about 1 river miles. From there it moves on through the Great Lakes, over Niagara Falls and down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Grand River; river miles along the main stem, rounded.
Grand River has a hot-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 24° in January. About 40 inches of rain fall in a normal year.
On November 14 Grand River normally reaches 53° and falls to 39°. The record high is 70°, in 1956; the record low 16°, in 1986. The most rain on this date, 1.69 in, fell in 1972.
Normals 1991–2020 and records since 1950 at Painesville 4 NW, here. NOAA, through RCC-ACIS.
