The Avoca 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.
Showers likely
Mostly cloudy
Mostly cloudy
Mostly sunny; warmer
Mostly sunny
Partly cloudy
Partly cloudy
80° on Nov. 11, 2020, the hottest reading for this week of the year since 1917. Next is 76° in 1956.
Avoca’s center stands about 1,190 ft above sea level. Within three miles the land runs from 1,160 ft to 1,880 ft, a difference of 720 ft: hilly country. The highest named summit within 15 miles is Old Blady, about 2,210 ft, 14 miles south-southwest.
Under the town center the state geologic map shows West Hill and Gardeau Formations (shale, siltstone), from the Late Devonian, 359 to 384 million years old.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 15×. 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, sandstone. Age: Late Devonian, 359 to 384 million years old. About 9 mi of the line.
Shale, siltstone. Age: Late Devonian, 359 to 384 million years old. About 8 mi of the line.
Sandstone. Age: Late Devonian, 359 to 384 million years old. About 2 mi of the line.
Sandstone. Age: Late Devonian, 359 to 384 million years old. About 2 mi of the line.
Sandstone. Age: Late Devonian, 359 to 384 million years old. About 2 mi of the line.
Shale. Age: Late Devonian, 359 to 384 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. 2 smaller units 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 Avoca reaches Chesapeake Bay and the Atlantic Ocean by way of the Cohocton, the Chemung and the Susquehanna: about 360 river miles.
Lake on the way: Lake Aldred.
250 miles of the trip are on the Susquehanna.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Avoca; river miles along the main stem, rounded.
Avoca has a warm-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 17° in January. A normal year brings about 36 inches of snow; with the rain, that comes to about 31 inches of water.
On November 14 Avoca normally reaches 51° and falls to 32°. The record high is 72°, in 1961; the record low 14°, in 2019. The most rain on this date, 0.80 in, fell in 1997.
Normals 1991–2020 and records since 1917 at Dansville, 18 miles northwest, 530 ft lower. NOAA, through RCC-ACIS.
