The Lockwood 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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80° on Nov. 12, 1999, the hottest reading for this week of the year since 1894. Next is 74° in 1990.
Lockwood’s center stands about 3,090 ft above sea level. Within three miles the land runs from 3,040 ft to 3,730 ft, a difference of 690 ft: hilly country. The highest named summit within 15 miles is Rattlesnake Butte, about 3,380 ft, 6 miles north.
Under the town center the state geologic map shows Gravel, from the Pleistocene to Holocene, less than 1.8 million years old.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 22×. 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: Late Cretaceous, 72 to 84 million years old. About 7 mi of the line.
Sandstone, shale. Age: Late Cretaceous, 72 to 84 million years old. About 5 mi of the line.
Shale. Age: Late Cretaceous, 72 to 84 million years old. About 4 mi of the line.
Shale. Age: Late Cretaceous, 90 to 94 million years old. About 3 mi of the line.
Age: Pleistocene to Holocene, less than 1.8 million years old. About 2 mi of the line.
Gravel, sand, silt. Age: Pleistocene to Holocene, less than 1.8 million years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 2 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.
A raindrop that lands in Lockwood reaches the Gulf of America by way of the Yellowstone, the Missouri and the Mississippi: about 3,100 river miles.
Lakes on the way: Lake Oahe, Lake Sakakawea, Lake Sharpe and Lake Francis Case.
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 Lockwood; river miles along the main stem, rounded.
Lockwood has a warm-summer humid continental climate. Summer afternoons average 86° in July; winter nights fall to about 14° in January. A normal year brings about 35 inches of snow; with the rain, that comes to about 15 inches of water.
On November 14 Lockwood normally reaches 47° and falls to 24°. The record high is 73°, in 2025; the record low −15°, in 1959. The most rain on this date, 0.50 in, fell in 1996.
Normals 1991–2020 and records since 1894 at Billings Water Treatment Plant, 5 miles southwest. NOAA, through RCC-ACIS.
