The Black Brook 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
Mostly cloudy; warmer
Mostly cloudy
Mostly sunny
Mostly sunny
Partly cloudy
Partly cloudy
70° on Nov. 11, 2002, the hottest reading for this week of the year since 1906. Next is 70° in 2012.
Black Brook’s center stands about 1,000 ft above sea level. Within three miles the land runs from 710 ft to 1,750 ft, a difference of 1,040 ft: steep hill country. The highest named summit within 15 miles is Whiteface Mountain, about 4,820 ft, 10 miles southwest.
Under the town center the state geologic map shows Pyroxene and/or hornblende granitic gneiss, from the Mesoproterozoic, 1 to 1.6 billion years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 7×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Gneiss, metaanorthosite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 11 mi of the line.
Gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 5 mi of the line.
Sandstone. Age: Cambrian, 487 to 497 million years old. About 3 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 3 mi of the line.
Metasedimentary, migmatite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 0.8 mi of the line.
Age: Mesoproterozoic, 1 to 1.6 billion years old. About 0.3 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit 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 Black Brook reaches the St. Lawrence River by way of Blake Brook, Black Brook, the West Branch Ausable, the Ausable and the Richelieu: about 150 river miles. The St. Lawrence carries it on to the Atlantic.
Lake on the way: Lake Champlain.
80 miles of the trip are on the Richelieu.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Black Brook; river miles along the main stem, rounded.
Black Brook has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 9° in January. About 43 inches of rain fall in a normal year.
On November 14 Black Brook normally reaches 45° and falls to 28°. The record high is 64°, in 2011; the record low 3°, in 2019. The most rain on this date, 0.87 in, fell in 1937.
Normals 1991–2020 and records since 1906 at Dannemora, 18 miles north, 340 ft higher. NOAA, through RCC-ACIS.
