The Walnut Creek 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
Sunny
Sunny
Partly cloudy
Mostly sunny
78° on Nov. 11, 2020, the hottest reading for this week of the year since 1916. Next is 75° in 1927.
Walnut Creek’s center stands about 1,160 ft above sea level. Within three miles the land runs from 980 ft to 1,280 ft, a difference of 300 ft: rolling country.
Under the town center the state geologic map shows Allegheny and Pottsville Groups, Undivided (shale, siltstone), from the Carboniferous, 299 to 324 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 44×. 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. Age: Carboniferous, 299 to 324 million years old. About 23 mi of the line.
Shale, siltstone, sandstone. Age: Devonian to Carboniferous, 324 to 422 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.
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 Walnut Creek reaches the Gulf of America by way of Goose Creek, Walnut Creek, South Fork Sugar Creek, Sugar Creek, the Tuscarawas, the Muskingum, the Ohio and the Mississippi: about 1,970 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 Walnut Creek; river miles along the main stem, rounded.
Walnut Creek has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 18° in January. A normal year brings about 20 inches of snow; with the rain, that comes to about 41 inches of water.
On November 14 Walnut Creek normally reaches 52° and falls to 31°. The record high is 71°, in 1994; the record low 11°, in 2019. The most rain on this date, 1.16 in, fell in 1972.
Normals 1991–2020 and records since 1916 at Millersburg, 10 miles west, 340 ft lower. NOAA, through RCC-ACIS.
