The Mandaree 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.
Partly cloudy
Partly cloudy
Partly cloudy
Mostly cloudy
Chance of showers; cooler
Mostly cloudy
Chance of showers
76° on Nov. 12, 1999, the hottest reading for this week of the year since 1950. Next is 70° in 1981.
Mandaree’s center stands about 2,180 ft above sea level. Within three miles the land runs from 2,010 ft to 2,410 ft, a difference of 400 ft: rolling country. The highest named summit within 15 miles is Saddle Butte, about 2,790 ft, 13 miles northwest.
Under the town center the state geologic map shows Sentinel Butte Formation (siltstone, claystone, sandstone), from the Paleocene, 56 to 66 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 26×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Siltstone, claystone, sandstone. Age: Paleocene, 56 to 66 million years old. About 22 mi of the line.
Claystone, siltstone. Age: Paleocene, 56 to 66 million years old. About 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 Mandaree reaches the Gulf of America by way of Squaw Creek, the Missouri and the Mississippi: about 2,630 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 Mandaree; river miles along the main stem, rounded.
Mandaree has a warm-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 4° in January. A normal year brings about 35 inches of snow; with the rain, that comes to about 18 inches of water.
On November 14 Mandaree normally reaches 39° and falls to 20°. The record high is 67°, in 2025; the record low −11°, in 2014. The most rain on this date, 0.59 in, fell in 1964.
Normals 1991–2020 and records since 1950 at Keene 3 S, 16 miles northwest, 290 ft higher. NOAA, through RCC-ACIS.
