The Eugene 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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5.94 inches of rain fell in two days, the most for this week of the year since records began in 1893. The next wettest, 3.17 inches, fell in 1985.
Eugene’s center stands about 870 ft above sea level. Within three miles the land runs from 660 ft to 1,000 ft, a difference of 340 ft: rolling country.
Under the town center the state geologic map shows Smithville Dolomite, Powell Dolomite, Cotter Dolomite, Jefferson City Dolomite (dolostone), from the Early Ordovician, 471 to 487 million years old.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 41×. 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 15 mi of the line.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 7 mi of the line.
Sandstone, chert. Age: Early Ordovician, 471 to 487 million years old. About 2 mi of the line.
Dolostone. Age: Cambrian, 487 to 497 million years old. About 0.4 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 Eugene reaches the Gulf of America by way of Jack Buster Creek, Saline Creek, the Osage, the Missouri and the Mississippi: about 1,370 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Eugene; river miles along the main stem, rounded.
Eugene has a hot-summer humid continental climate. Summer afternoons average 89° in July; winter nights fall to about 22° in January. About 45 inches of rain fall in a normal year.
On November 14 Eugene normally reaches 56° and falls to 36°. The record high is 84°, in 1999; the record low 4°, in 1986. The most rain on this date, 2.22 in, fell in 1985.
Normals 1991–2020 and records since 1893 at Eldon, 10 miles west. NOAA, through RCC-ACIS.
