The Isabelle 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
Partly cloudy
Partly cloudy
Partly cloudy
Partly cloudy
Showers likely
5° on Nov. 15, 2014, the coldest reading for this week of the year since 1948. Next is 5° in 2019.
Isabelle’s center stands about 710 ft above sea level. Within three miles the land runs from 660 ft to 1,130 ft, a difference of 470 ft: hilly country. The highest named summit within 15 miles is Farm Hill, about 1,180 ft, 14 miles east-southeast.
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 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 34×. 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: Early Ordovician, 471 to 487 million years old. About 7 mi of the line.
Dolostone, sandstone. Age: Early Ordovician, 471 to 487 million years old. About 6 mi of the line.
Sandstone. Age: Cambrian, 487 to 542 million years old. About 5 mi of the line.
Sandstone, siltstone, shale. Age: Cambrian, 487 to 497 million years old. About 3 mi of the line.
Sandstone, siltstone, shale. Age: Middle Cambrian to Cambrian, 487 to 521 million years old. About 1 mi of the line.
Sandstone. Age: Ordovician, 445 to 487 million years old. About 0.9 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit along the line are not listed.
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 Isabelle reaches the Gulf of America by way of Lake Pepin and the Mississippi: about 1,760 river miles.
Lake on the way: Lake Pepin.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Isabelle; river miles along the main stem, rounded.
Isabelle has a hot-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 6° in January. About 32 inches of rain fall in a normal year.
On November 14 Isabelle normally reaches 43° and falls to 27°. The record high is 69°, in 1999; the record low 8°, in 2018. The most rain on this date, 0.98 in, fell in 1951.
Normals 1991–2020 and records since 1948 at Red Wing Dam 3, 10 miles west-northwest. NOAA, through RCC-ACIS.
