The Matlock 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.
Mostly sunny
Mostly sunny
Mostly sunny
Partly cloudy
Mostly cloudy
Partly cloudy
Showers likely
75° on Nov. 14, 1999, the hottest reading for this week of the year since 1914. Next is 73° in 2001.
Matlock’s center stands about 1,400 ft above sea level. Within three miles the land runs from 1,360 ft to 1,450 ft, a difference of 90 ft: gently rolling country.
Under the town center the state geologic map shows Dakata and Windrow Formations (sandstone, shale), from the Early Cretaceous to Late Cretaceous, 94 to 113 million years old.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, shale. Age: Early Cretaceous to Late Cretaceous, 94 to 113 million years old. About 24 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 Matlock reaches the Gulf of America by way of Otter Creek, the Little Rock, the Rock River, the Big Sioux, the Missouri and the Mississippi: about 2,030 river miles.
1,170 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Matlock; river miles along the main stem, rounded.
Matlock has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 6° in January. A normal year brings about 41 inches of snow; with the rain, that comes to about 32 inches of water.
On November 14 Matlock normally reaches 44° and falls to 24°. The record high is 75°, in 1999; the record low −16°, in 1959. The most rain on this date, 0.92 in, fell in 1926.
Normals 1991–2020 and records since 1914 at Sanborn, 14 miles east-southeast, 130 ft higher. NOAA, through RCC-ACIS.
