The Donegal 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.
Chance of showers
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76° on Nov. 14, 1994, the hottest reading for this week of the year since 1943. Next is 75° in 1949.
Donegal’s center stands about 1,270 ft above sea level. Within three miles the land runs from 1,110 ft to 1,430 ft, a difference of 320 ft: rolling country. The highest named summit within 15 miles is Peach Hill, about 1,540 ft, 10 miles east.
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 29×. 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. Age: Carboniferous, 299 to 324 million years old. About 15 mi of the line.
Sandstone. Age: Carboniferous, 299 to 324 million years old. About 7 mi of the line.
Sandstone. Age: Carboniferous, 324 to 359 million years old. About 1 mi of the line.
Sandstone, conglomerate. Age: Carboniferous, 299 to 324 million years old. About 0.6 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 Donegal reaches the Gulf of America by way of Buffalo Creek, the Allegheny, the Ohio and the Mississippi: about 2,010 river miles.
970 miles of the trip are on the Ohio.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Donegal; river miles along the main stem, rounded.
Donegal has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 17° in January. About 44 inches of rain fall in a normal year.
On November 14 Donegal normally reaches 52° and falls to 30°. The record high is 76°, in 1994; the record low 9°, in 1986. The most rain on this date, 0.75 in, fell in 2007.
Normals 1991–2020 and records since 1943 at Ford City 4 S Dam, 18 miles southeast, 340 ft lower. NOAA, through RCC-ACIS.
