The West Allis 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
Mostly sunny
Mostly sunny
Partly cloudy
Partly cloudy
Partly cloudy
71° on Nov. 14, 1971, the hottest reading for this week of the year since 1948. Next is 70° in 2025.
West Allis’s center stands about 740 ft above sea level. Within three miles the land runs from 600 ft to 820 ft, a difference of 220 ft: rolling country.
Under the town center the state geologic map shows Silurian, undivided (dolostone), from the Silurian, 422 to 445 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 41×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Dolostone. Age: Silurian, 422 to 445 million years old. About 17 mi of the line.
Limestone, shale. Age: Middle Devonian, 384 to 394 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.
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 West Allis reaches Lake Michigan by way of the Menomonee, the Milwaukee and the Kinnickinnic: about 8 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 West Allis; river miles along the main stem, rounded.
West Allis has a hot-summer humid continental climate. Summer afternoons average 85° in July; winter nights fall to about 15° in January. A normal year brings about 52 inches of snow; with the rain, that comes to about 39 inches of water.
On November 14 West Allis normally reaches 48° and falls to 31°. The record high is 71°, in 1971; the record low 12°, in 1959. The most rain on this date, 1.02 in, fell in 1957.
Normals 1991–2020 and records since 1948 at West Allis, here. NOAA, through RCC-ACIS.
