The Gwinner 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.
Sunny
Mostly sunny; warmer
Mostly sunny
Mostly cloudy
Chance of showers
Partly cloudy; cooler
Showers likely
71° on Nov. 17, 1953, the hottest reading for this week of the year since 1893. Next is 71° in 2001.
Gwinner’s center stands about 1,260 ft above sea level. Within three miles the land runs from 1,210 ft to 1,410 ft, a difference of 200 ft: gently rolling country.
Under the town center the state geologic map shows Carlile Formation (shale), from the Late Cretaceous, 66 to 100 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 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.
Shale. Age: Late Cretaceous, 66 to 100 million years old. About 22 mi of the line.
Shale. Age: Late Cretaceous, 66 to 100 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 Gwinner reaches Hudson Bay by way of the Wild Rice, the Red River of the North and the Nelson: about 1,300 river miles. Past the border it runs north through Canada to Hudson Bay.
Lake on the way: Lake Winnipeg.
470 miles of the trip are on the Red River of the North.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Gwinner; river miles along the main stem, rounded.
Gwinner has a warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 0° in January. About 23 inches of rain fall in a normal year.
On November 14 Gwinner normally reaches 39° and falls to 20°. The record high is 67°, in 2016; the record low −13°, in 1940. The most rain on this date, 0.55 in, fell in 1971.
Normals 1991–2020 and records since 1893 at Forman 5 SSE, 14 miles south-southeast. NOAA, through RCC-ACIS.
