The Havana 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.
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Showers likely
73° on Nov. 11, 2012, the hottest reading for this week of the year since 1961. Next is 71° in 1999.
Havana’s center stands about 1,220 ft above sea level. Within three miles the land runs from 1,190 ft to 1,290 ft, a difference of 100 ft: gently rolling country.
Under the town center the state geologic map shows Upper Ordovician (limestone, dolostone), from the Late Ordovician, 445 to 459 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 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.
Limestone, dolostone. Age: Late Ordovician, 445 to 459 million years old. About 22 mi of the line.
Shale, limestone, sandstone. Age: Middle Ordovician to Late Ordovician, 445 to 471 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 Havana reaches the Gulf of America by way of Maple Creek, the Straight, the Cannon and the Mississippi: about 1,860 river miles.
Lake on the way: Lake Pepin.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Havana; river miles along the main stem, rounded.
Havana has a hot-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 5° in January. A normal year brings about 44 inches of snow; with the rain, that comes to about 36 inches of water.
On November 14 Havana normally reaches 42° and falls to 26°. The record high is 71°, in 1999; the record low 5°, in 2014. The most rain on this date, 0.37 in, fell in 1973.
Normals 1991–2020 and records since 1961 at Owatonna, 5 miles west-northwest. NOAA, through RCC-ACIS.
