The Lacomb 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.
Chance of showers
Showers likely
Chance of showers
Chance of showers
Chance of showers
Partly cloudy
Partly cloudy
70° on Nov. 12, 1981, the hottest reading for this week of the year since 1973. Next is 69° in 1976.
Lacomb’s center stands about 680 ft above sea level. Within three miles the land runs from 360 ft to 1,170 ft, a difference of 810 ft: hilly country. The highest named summit within 15 miles is Crabtree Mountain, about 4,480 ft, 14 miles east.
Under the town center the state geologic map shows Terrace gravels (gravel, boulders, fine-detrital), from the Pliocene to Pleistocene, less than 5.3 million years old.
The section below crosses 12 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 5×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Basalt, basaltic-andesite. Age: Oligocene to Miocene, 5.3 to 34 million years old. About 5 mi of the line.
Gravel, boulders, fine-detrital. Age: Pliocene to Pleistocene, less than 5.3 million years old. About 5 mi of the line.
Basaltic-andesite, basalt. Age: Early Pliocene to Pleistocene, 1.2 to 3.9 million years old. About 4 mi of the line.
Sand, gravel, silt. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Basalt, basaltic-andesite. Age: Oligocene to Miocene, 5.3 to 34 million years old. About 2 mi of the line.
Gravel, boulders, clay. Age: Pleistocene to Holocene, less than 2.6 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. 6 smaller units 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 Lacomb reaches the Pacific Ocean by way of Carter Creek, Beaver Creek, Crabtree Creek, the South Santiam, the Santiam, the Willamette and the Columbia: about 240 river miles.
Lake on the way: Willamette Falls Hydroelectric Power Reservoir.
100 miles of the trip are on the Columbia.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Lacomb; river miles along the main stem, rounded.
Lacomb has a warm-summer Mediterranean climate. Summer afternoons average 82° in August; winter nights fall to about 33° in January. About 57 inches of rain fall in a normal year, with about 2 inches of snow.
On November 14 Lacomb normally reaches 52° and falls to 37°. The record high is 69°, in 1999; the record low 18°, in 1978. The most rain on this date, 1.86 in, fell in 2014.
Normals 1991–2020 and records since 1973 at Lacomb 3 NNE, 3 miles north-northeast, 160 ft lower. NOAA, through RCC-ACIS.
