The Green Harbor 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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76° on Nov. 12, 2022, the hottest reading for this week of the year since 1996. Next is 75° in 2020.
Green Harbor’s center stands barely above sea level. Within three miles the land runs from 0 ft to 110 ft, a difference of 110 ft: gently rolling country. Open water lies within three miles. The highest named summit within 15 miles is Pine Hills, about 410 ft, 11 miles south-southeast.
Under the town center the state geologic map shows Granite, gneiss, and schist, undivided (granite, gneiss, schist), from the Neoproterozoic, 542 to 1,000 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. 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, gneiss, schist. Age: Neoproterozoic, 542 to 1,000 million years old. About 5 mi of the line.
Granite. Age: Neoproterozoic, 615 to 645 million years old. About 4 mi of the line.
Sandstone, graywacke. Age: Carboniferous, 299 to 324 million years old. About 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.
Rain that falls on Green Harbor runs straight into the Atlantic Ocean.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Green Harbor; river miles along the main stem, rounded.
Green Harbor has a hot-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 20° in January. About 48 inches of rain fall in a normal year.
On November 14 Green Harbor normally reaches 53° and falls to 34°. The record high is 68°, in 2005; the record low 17°, in 2019. The most rain on this date, 0.51 in, fell in 2000.
Normals 1991–2020 and records since 1996 at Plymouth Municipal Airport, 12 miles south-southwest, 130 ft higher. NOAA, through RCC-ACIS.
