The Westby 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
Showers likely; cooler
Mostly cloudy
Mostly cloudy
73° on Nov. 13, 1999, the hottest reading for this week of the year since 1937. Next is 66° in 1953.
Westby’s center stands about 2,080 ft above sea level. Within three miles the land runs from 2,040 ft to 2,230 ft, a difference of 190 ft: gently rolling country.
Under the town center the state geologic map shows Tongue River Member of Fort Union Formation (sandstone, shale), from the Early Paleocene to Middle Paleocene, 59 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 43×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, shale. Age: Early Paleocene to Middle Paleocene, 59 to 66 million years old. About 12 mi of the line.
Claystone, siltstone. Age: Paleocene, 56 to 66 million years old. About 12 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.
Westby has a warm-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about −2° in January. About 15 inches of rain fall in a normal year.
On November 14 Westby normally reaches 37° and falls to 15°. The record high is 62°, in 1939; the record low −16°, in 1940. The most rain on this date, 0.24 in, fell in 1964.
Normals 1991–2020 and records since 1937 at Westby, here. NOAA, through RCC-ACIS.
