The Sanborn 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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72° on Nov. 17, 1953, the hottest reading for this week of the year since 1916. Next is 69° in 1931.
Sanborn’s center stands about 670 ft above sea level. Within three miles the land runs from 570 ft to 890 ft, a difference of 320 ft: rolling country. The highest named summit within 15 miles is Hickey Hill, about 1,040 ft, 8 miles west-southwest.
Under the town center the state geologic map shows Antrim Shale (black-shale), from the Late Devonian, 359 to 384 million years old.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 40×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Black-shale. Age: Late Devonian, 359 to 384 million years old. About 14 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 Sanborn runs straight into Lake Huron. From there it moves on through the Great Lakes, over Niagara Falls and down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Sanborn; river miles along the main stem, rounded.
Sanborn has a warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 11° in February. A normal year brings about 78 inches of snow; with the rain, that comes to about 30 inches of water.
On November 14 Sanborn normally reaches 45° and falls to 29°. The record high is 66°, in 1994; the record low 3°, in 1940. The most rain on this date, 0.61 in, fell in 1957.
Normals 1991–2020 and records since 1916 from the Alpena Area threaded record (Alpena County Regional Airport, 14 miles north-northwest). NOAA, through RCC-ACIS.
