The Three Rivers 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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75° on Nov. 11, 2020, the hottest reading for this week of the year since 1895. Next is 75° in 2022.
Three Rivers’s center stands about 810 ft above sea level. Within three miles the land runs from 780 ft to 950 ft, a difference of 170 ft: gently rolling country. The highest named summit within 15 miles is Bald Hill, about 1,180 ft, 10 miles west.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 52×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale. Age: Carboniferous, 324 to 359 million years old. About 23 mi of the line.
Shale. Age: Late Devonian, 359 to 384 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.
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 Three Rivers reaches Lake Michigan by way of the Portage and the Saint Joseph: about 110 river miles. 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 Three Rivers; river miles along the main stem, rounded.
Three Rivers has a warm-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 17° in January. A normal year brings about 41 inches of snow; with the rain, that comes to about 40 inches of water.
On November 14 Three Rivers normally reaches 48° and falls to 31°. The record high is 72°, in 1989; the record low 9°, in 2019. The most rain on this date, 1.40 in, fell in 1957.
Normals 1991–2020 and records since 1895 at Three Rivers, here. NOAA, through RCC-ACIS.
