The Prophetstown 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 sunny
Partly cloudy
Mostly sunny
Chance of showers
76° on Nov. 11, 2022, the hottest reading for this week of the year since 1895. Next is 75° in 1911.
Prophetstown’s center stands about 630 ft above sea level. Within three miles the land runs from 580 ft to 660 ft, a difference of 80 ft: gently rolling country.
Under the town center the state geologic map shows Silurian System undivided (dolostone, limestone), from the Silurian, 422 to 445 million years old.
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.
Dolostone, limestone. Age: Silurian, 422 to 445 million 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 Prophetstown reaches the Gulf of America by way of the Rock River and the Mississippi: about 1,500 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Prophetstown; river miles along the main stem, rounded.
Prophetstown has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 12° in January. A normal year brings about 32 inches of snow; with the rain, that comes to about 38 inches of water.
On November 14 Prophetstown normally reaches 48° and falls to 29°. The record high is 75°, in 1999; the record low 3°, in 1996. The most rain on this date, 1.25 in, fell in 1926.
Normals 1991–2020 and records since 1895 at Morrison, 9 miles north-northwest. NOAA, through RCC-ACIS.
