The New Harmony 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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Showers likely; cooler
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78° on Nov. 13, 1967, the hottest reading for this week of the year since 1911. Next is 75° in 1956.
New Harmony’s center stands about 5,310 ft above sea level. Within three miles the land runs from 5,090 ft to 7,500 ft, a difference of 2,410 ft: mountain country. The highest named summit within 15 miles is Signal Peak, about 10,360 ft, 15 miles southwest.
Under the town center the state geologic map shows Alluvium and colluvium (unconsolidated), from the Quaternary, less than 2.6 million years old.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 4×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Quartz-monzonite. Age: Early Oligocene to Early Miocene, 16 to 34 million years old. About 8 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 8 mi of the line.
Felsic-volcanic. Age: Late Oligocene to Middle Miocene, 12 to 28 million years old. About 7 mi of the line.
Conglomerate-sandstone. Age: Miocene to Pliocene, 2.6 to 23 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 New Harmony reaches the Gulf of California by way of North Ash Creek, Ash Creek, the Virgin and the Colorado: about 620 river miles.
Lakes on the way: Lake Mead, Lake Mohave and Lake Havasu.
290 miles of the trip are on the Colorado.
Seldom reaches the sea. Dams and canals now take nearly all of the Colorado before its old delta in Mexico.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of New Harmony; river miles along the main stem, rounded.
New Harmony has a dry-summer hot-summer continental climate. Summer afternoons average 90° in July; winter nights fall to about 20° in December. A normal year brings about 38 inches of snow; with the rain, that comes to about 18 inches of water.
On November 14 New Harmony normally reaches 56° and falls to 28°. The record high is 74°, in 1999; the record low 8°, in 2000. The most rain on this date, 1.97 in, fell in 1955.
Normals 1991–2020 and records since 1911 at New Harmony, here, 140 ft lower. NOAA, through RCC-ACIS.
