The Arrowhead 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
Partly cloudy
Mostly cloudy
Chance of showers
Chance of showers
Showers likely
−9° on Nov. 15, 2014, the coldest reading for this week of the year since 1903. Next is −7° in 1986.
Arrowhead’s center stands about 1,340 ft above sea level. Within three miles the land runs from 1,220 ft to 1,500 ft, a difference of 280 ft: rolling country.
Under the town center the state geologic map shows Slate and graywacke (slate, graywacke), from the Paleoproterozoic, 1.6 to 2 billion years old.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 59×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Slate, graywacke. Age: Paleoproterozoic, 1.6 to 2 billion 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 Arrowhead reaches Lake Superior by way of the Saint Louis: about 45 river miles. From there it moves on through the Great Lakes, over Niagara Falls and down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Arrowhead; river miles along the main stem, rounded.
Arrowhead has a warm-summer humid continental climate. Summer afternoons average 77° in July; winter nights fall to about −4° in January. A normal year brings about 56 inches of snow; with the rain, that comes to about 28 inches of water.
On November 14 Arrowhead normally reaches 37° and falls to 20°. The record high is 67°, in 1999; the record low −2°, in 1996. The most rain on this date, 1.18 in, fell in 1909.
Normals 1991–2020 and records since 1903 at Floodwood 2 E, 7 miles northwest. NOAA, through RCC-ACIS.
