The Old Washington 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; warmer
Partly cloudy
Partly cloudy
Sunny
Partly cloudy
Mostly sunny
3.02 inches of rain fell in two days, the most for this week of the year since records began in 1895. The next wettest, 2.27 inches, fell in 2022.
Old Washington’s center stands about 1,000 ft above sea level. Within three miles the land runs from 810 ft to 1,120 ft, a difference of 310 ft: rolling country. The highest named summit within 15 miles is Beatty Knob, about 1,260 ft, 13 miles south.
Under the town center the state geologic map shows Conemaugh Group (shale, siltstone, mudstone), from the Carboniferous, 299 to 324 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 40×. 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, siltstone, mudstone. Age: Carboniferous, 299 to 324 million years old. About 20 mi of the line.
Shale, siltstone, mudstone. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.
Shale, siltstone. Age: Carboniferous, 299 to 324 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 Old Washington reaches the Gulf of America by way of Hawkins Run, Leatherwood Creek, Wills Creek, the Muskingum, the Ohio and the Mississippi: about 1,950 river miles.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Old Washington; river miles along the main stem, rounded.
Old Washington has a hot-summer humid continental climate. Summer afternoons average 85° in July; winter nights fall to about 22° in January. About 39 inches of rain fall in a normal year.
On November 14 Old Washington normally reaches 54° and falls to 34°. The record high is 75°, in 1909; the record low 9°, in 1986. The most rain on this date, 1.33 in, fell in 2011.
Normals 1991–2020 and records since 1895 from the Zanesville Area threaded record (Zanesville Municipal Airport, 25 miles west-southwest, 120 ft lower). NOAA, through RCC-ACIS.
