The Ferryville 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
Partly cloudy
Chance of showers
74° on Nov. 13, 1999, the hottest reading for this week of the year since 1936. Next is 71° in 1941.
Ferryville’s center stands about 1,050 ft above sea level. Within three miles the land runs from 610 ft to 1,120 ft, a difference of 510 ft: hilly country.
Under the town center the state geologic map shows Cambrian, undivided (sandstone), from the Cambrian, 487 to 542 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 28×. 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, sandstone. Age: Early Ordovician to Late Ordovician, 454 to 487 million years old. About 9 mi of the line.
Sandstone. Age: Ordovician, 445 to 487 million years old. About 6 mi of the line.
Sandstone. Age: Cambrian, 487 to 542 million years old. About 6 mi of the line.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 2 mi of the line.
Sandstone, dolostone. Age: Cambrian, 487 to 497 million years old. About 0.6 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 Ferryville reaches the Gulf of America by way of Lake Winneshiek and the Mississippi: about 1,640 river miles.
Lake on the way: Lake Winneshiek.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Ferryville; river miles along the main stem, rounded.
Ferryville has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 10° in January. A normal year brings about 36 inches of snow; with the rain, that comes to about 36 inches of water.
On November 14 Ferryville normally reaches 45° and falls to 29°. The record high is 71°, in 1964; the record low 6°, in 1959. The most rain on this date, 0.61 in, fell in 1994.
Normals 1991–2020 and records since 1936 at Lynxville Dam 9, 10 miles south, 420 ft lower. NOAA, through RCC-ACIS.
