The Washburn 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.
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67° on Nov. 11, 2020, the hottest reading for this week of the year since 1939. Next is 66° in 2002.
Washburn’s center stands about 490 ft above sea level. Within three miles the land runs from 440 ft to 750 ft, a difference of 310 ft: rolling country. The highest named summit within 15 miles is Scopan Mountain, about 1,470 ft, 13 miles south.
Under the town center the state geologic map shows Silurian - Ordovician Carys Mills Formation (siltstone, limestone), from the Late Ordovician to Silurian, 434 to 459 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 24×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Siltstone, limestone. Age: Late Ordovician to Silurian, 434 to 459 million years old. About 10 mi of the line.
Graywacke, slate. Age: Late Ordovician to Silurian, 434 to 459 million years old. About 6 mi of the line.
Mudstone. Age: Silurian, 422 to 445 million years old. About 4 mi of the line.
Basalt. Age: Ordovician, 445 to 487 million years old. About 3 mi of the line.
Mudstone, sandstone. Age: Devonian, 359 to 422 million years old. About 1 mi of the line.
Argillite. Age: Ordovician, 445 to 487 million years old. About 0.4 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 Washburn reaches the Bay of Fundy and the Atlantic Ocean by way of the Aroostook and the Saint John: about 230 river miles.
190 miles of the trip are on the Saint John.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Washburn; river miles along the main stem, rounded.
Washburn has a warm-summer humid continental climate. Summer afternoons average 77° in July; winter nights fall to about 3° in January. A normal year brings about 118 inches of snow; with the rain, that comes to about 41 inches of water.
On November 14 Washburn normally reaches 40° and falls to 26°. The record high is 60°, in 1951; the record low 3°, in 2019. The most rain on this date, 2.22 in, fell in 2006.
Normals 1991–2020 and records since 1939 from the Caribou Area threaded record (Caribou Wfo, 9 miles northeast, 130 ft higher). NOAA, through RCC-ACIS.
