The Brookfield 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.
Mostly cloudy
Mostly sunny; warmer
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76° on Nov. 11, 2020, the hottest reading for this week of the year since 1953. Next is 73° in 2022.
Brookfield’s center stands about 620 ft above sea level. Within three miles the land runs from 530 ft to 1,640 ft, a difference of 1,110 ft: steep hill country. The highest named summit within 15 miles is Green Mountain, about 1,920 ft, 14 miles north.
Under the town center the state geologic map shows Rangeley Formation, Ribbon-banded calc-silicate of eastern New Hampshire (calc-silicate-rock), from the Silurian, 434 to 445 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 14×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Granite. Age: Carboniferous, 299 to 359 million years old. About 11 mi of the line.
Quartzite, metasedimentary. Age: Silurian, 422 to 445 million years old. About 4 mi of the line.
Metaclastic. Age: Silurian, 434 to 445 million years old. About 3 mi of the line.
Calc-silicate-rock. Age: Silurian, 434 to 445 million years old. About 2 mi of the line.
Pelitic-schist, metasandstone. Age: Silurian, 434 to 445 million years old. About 1 mi of the line.
Gabbro. Age: Cretaceous, 66 to 145 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 Brookfield reaches the Atlantic Ocean by way of Churchill Brook, the Branch, the Salmon Falls and the Piscataqua: about 55 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Brookfield; river miles along the main stem, rounded.
Brookfield has a warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 10° in January. About 51 inches of rain fall in a normal year.
On November 14 Brookfield normally reaches 49° and falls to 27°. The record high is 71°, in 1989; the record low 9°, in 2019. The most rain on this date, 1.60 in, fell in 2018.
Normals 1991–2020 and records since 1953 at Sanford 2 NNW, 16 miles east-southeast, 330 ft lower. NOAA, through RCC-ACIS.
