The Nephi 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.
Chance of showers
Partly cloudy; warmer
Mostly cloudy
Showers likely
Partly cloudy
Showers likely
Showers likely
76° on Nov. 15, 1999, the hottest reading for this week of the year since 1904. Next is 74° in 1953.
Nephi’s center stands about 5,140 ft above sea level. Within three miles the land runs from 5,000 ft to 6,440 ft, a difference of 1,440 ft: steep hill country. The highest named summit within 15 miles is Mount Nebo, about 11,840 ft, 9 miles north-northeast.
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 3×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 15 mi of the line.
Sandstone. Age: Carboniferous to Permian, 273 to 324 million years old. About 9 mi of the line.
Mudstone. Age: Middle Jurassic, 164 to 175 million years old. About 0.4 mi of the line.
Unconsolidated. Age: Pleistocene, less than 2.6 million years old. About 0.3 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 Nephi reaches Great Salt Lake by way of Currant Creek and the Jordan: about 110 river miles. Great Salt Lake has no outlet to the sea: the water leaves only by evaporating or soaking into the ground.
Lake on the way: Utah Lake.
50 miles of the trip are on the Jordan.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Nephi; river miles along the main stem, rounded.
Nephi has a hot-summer humid continental climate. Summer afternoons average 89° in July; winter nights fall to about 20° in January. A normal year brings about 45 inches of snow; with the rain, that comes to about 14 inches of water.
On November 14 Nephi normally reaches 50° and falls to 29°. The record high is 73°, in 1990; the record low 12°, in 1994. The most rain on this date, 0.78 in, fell in 1955.
Normals 1991–2020 and records since 1904 at Nephi, here. NOAA, through RCC-ACIS.
