The Yorkville 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
Mostly cloudy
Sunny
Sunny
Partly cloudy
Mostly sunny
10° on Nov. 17, 1933, the coldest reading for this week of the year since 1916. Next is 13° in 1986.
Yorkville’s center stands about 680 ft above sea level. Within three miles the land runs from 630 ft to 1,260 ft, a difference of 630 ft: hilly country. The highest named summit within 15 miles is Sampson Hill, about 1,470 ft, 15 miles east-southeast.
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 7 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, siltstone, mudstone. Age: Carboniferous, 299 to 324 million years old. About 10 mi of the line.
Sandstone, siltstone, shale. Age: Carboniferous to Permian, 252 to 324 million years old. About 8 mi of the line.
Sandstone, siltstone, shale. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.
Shale, siltstone, mudstone. Age: Carboniferous, 299 to 324 million years old. About 1 mi of the line.
Sandstone, shale. Age: Permian, 252 to 299 million years old. About 1 mi of the line.
Mudstone, shale, siltstone. Age: Carboniferous to Permian, 252 to 324 million years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit along the line are not listed.
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 Yorkville reaches the Gulf of America by way of the Ohio and the Mississippi: about 1,860 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 Yorkville; river miles along the main stem, rounded.
Yorkville has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 22° in January. A normal year brings about 15 inches of snow; with the rain, that comes to about 41 inches of water.
On November 14 Yorkville normally reaches 53° and falls to 35°. The record high is 74°, in 1955; the record low 13°, in 1986. The most rain on this date, 1.10 in, fell in 1997.
Normals 1991–2020 and records since 1916 at Pike Island(Lock And Dam), here. NOAA, through RCC-ACIS.
