The Larimer 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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73° on Nov. 15, 1993, the hottest reading for this week of the year since 1972. Next is 73° in 2020.
Larimer’s center stands about 2,520 ft above sea level. Within three miles the land runs from 1,890 ft to 2,660 ft, a difference of 770 ft: hilly country. The highest named summit within 15 miles is Mount Davis, about 3,220 ft, 13 miles west.
Under the town center the state geologic map shows Foreknobs Formation (sandstone), from the Late Devonian, 359 to 384 million years old.
The section below crosses 16 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 9×. 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, clastic. Age: Carboniferous, 299 to 324 million years old. About 5 mi of the line.
Sandstone. Age: Carboniferous, 299 to 324 million years old. About 4 mi of the line.
Sandstone. Age: Late Devonian, 359 to 384 million years old. About 3 mi of the line.
Sandstone, siltstone, shale. Age: Late Devonian, 359 to 384 million years old. About 2 mi of the line.
Shale. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.
Claystone, shale. Age: Carboniferous, 299 to 324 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. 10 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.
Larimer straddles the Eastern Continental Divide. Rain on the southwest side runs to the Gulf of America; most of the rest goes to Chesapeake Bay and the Atlantic Ocean.
From the center of town, a raindrop reaches Chesapeake Bay and the Atlantic Ocean by way of Wills Creek, the North Branch Potomac and the Potomac: about 350 river miles. One that lands on the southwest side reaches the Gulf of America by way of Flaugherty Creek, the Casselman, the Youghiogheny, the Monongahela, the Ohio and the Mississippi: about 2,080 river miles.
290 miles of the trip are on the Potomac.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Larimer; river miles along the main stem, rounded.
Larimer has a warm-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about 19° in January. A normal year brings about 72 inches of snow; with the rain, that comes to about 45 inches of water.
On November 14 Larimer normally reaches 49° and falls to 32°. The record high is 64°, in 2005; the record low 8°, in 1986. The most rain on this date, 0.69 in, fell in 1972.
Normals 1991–2020 and records since 1972 at Frostburg 2, 9 miles south, 350 ft lower. NOAA, through RCC-ACIS.
