The Pacific 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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4.65 inches of rain fell in two days, the most for this week of the year since records began in 1982. The next wettest, 3.43 inches, fell in 2015.
Pacific’s center stands about 70 ft above sea level. Within three miles the land runs from 50 ft to 620 ft, a difference of 570 ft: hilly country. The highest named summit within 15 miles is Pinnacle Peak, about 1,780 ft, 14 miles east-southeast.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 23×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Silt, sand. Age: Holocene, less than 12,000 years old. About 7 mi of the line.
Fine-detrital, coarse-detrital. Age: Pleistocene, less than 2.6 million years old. About 6 mi of the line.
Fine-detrital, coarse-detrital. Age: Late Pliocene to Pleistocene, less than 3.6 million years old. About 4 mi of the line.
Fine-detrital, coarse-detrital. Age: Pleistocene, less than 2.6 million years old. About 3 mi of the line.
Fine-detrital, coarse-detrital. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
Sand, clay, silt. Age: Holocene, less than 12,000 years old. About 0.3 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 Pacific reaches Puget Sound and the Pacific Ocean by way of the White River and the Puyallup: about 14 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Pacific; river miles along the main stem, rounded.
Pacific has a warm-summer Mediterranean climate. Summer afternoons average 77° in July; winter nights fall to about 37° in February. About 41 inches of rain fall in a normal year.
On November 14 Pacific normally reaches 53° and falls to 41°. The record high is 65°, in 2021; the record low 24°, in 2014. The most rain on this date, 4.20 in, fell in 2001.
Normals 1991–2020 and records since 1982 at Tacoma No. 1, 8 miles west. NOAA, through RCC-ACIS.
