The Evans Mills 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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74° on Nov. 11, 2020, the hottest reading for this week of the year since 1893. Next is 71° in 2012.
Evans Mills’s center stands about 430 ft above sea level. Within three miles the land runs from 400 ft to 610 ft, a difference of 210 ft: rolling country. The highest named summit within 15 miles is Underwood Hill, about 1,160 ft, 13 miles south.
Under the town center the state geologic map shows Theresa Formation (dolostone), from the Cambrian to Early Ordovician, 471 to 542 million years old.
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 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.
Limestone. Age: Middle Ordovician, 459 to 471 million years old. About 7 mi of the line.
Dolostone. Age: Cambrian to Early Ordovician, 471 to 542 million years old. About 6 mi of the line.
Limestone. Age: Middle Ordovician, 459 to 471 million years old. About 6 mi of the line.
Sandstone. Age: Cambrian, 487 to 497 million years old. About 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 Evans Mills reaches the St. Lawrence River by way of West Creek, the Indian, the Oswegatchie and the Saint Lawrence: about 110 river miles. The St. Lawrence carries it on to the Atlantic.
Lakes on the way: Lake Saint Lawrence and Black Lake.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Evans Mills; river miles along the main stem, rounded.
Evans Mills has a warm-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about 11° in January. A normal year brings about 116 inches of snow; with the rain, that comes to about 44 inches of water.
On November 14 Evans Mills normally reaches 47° and falls to 31°. The record high is 66°, in 2009; the record low 0°, in 2019. The most rain on this date, 0.76 in, fell in 1936.
Normals 1991–2020 and records since 1893 at Watertown, 8 miles south-southwest. NOAA, through RCC-ACIS.
