The La Prairie 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.
73° on Nov. 17, 1953, the hottest reading for this week of the year since 1911. Next is 67° in 1934.
La Prairie’s center stands about 1,850 ft above sea level. Within three miles the land runs from 1,450 ft to 1,960 ft, a difference of 510 ft: hilly country.
Under the town center the state geologic map shows Granitic intrusion, from the Neoarchean, 2.5 to 2.8 billion 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 38×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Granitic. Age: Neoarchean, 2.5 to 2.8 billion years old. About 21 mi of the line.
Granitic. Age: Neoarchean, 2.5 to 2.8 billion years old. About 2 mi of the line.
Granite, granodiorite. Age: Neoarchean, 2.5 to 2.8 billion years old. About 1 mi of the line.
Metabasalt, greenstone. Age: Neoarchean, 2.5 to 2.8 billion years old. About 0.4 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 La Prairie reaches Hudson Bay by way of Buckboard Creek, the Wild Rice, the Red River of the North and the Nelson: about 1,190 river miles. Past the border it runs north through Canada to Hudson Bay.
Lake on the way: Lake Winnipeg.
400 miles of the trip are on the Nelson.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of La Prairie; river miles along the main stem, rounded.
La Prairie has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about −4° in January. A normal year brings about 52 inches of snow; with the rain, that comes to about 28 inches of water.
On November 14 La Prairie normally reaches 35° and falls to 19°. The record high is 70°, in 1953; the record low −20°, in 1940. The most rain on this date, 1.00 in, fell in 1951.
Normals 1991–2020 and records since 1911 at Itasca University Of Minn, 13 miles east-southeast, 360 ft lower. NOAA, through RCC-ACIS.