The Washington 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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5.64 inches of rain fell in two days, the most for this week of the year since records began in 1892. The next wettest, 4.78 inches, fell in 1935.
Washington’s center stands about 460 ft above sea level. Within three miles the land runs from 330 ft to 500 ft, a difference of 170 ft: gently rolling country.
Under the town center the state geologic map shows Nacatoch Sand (sandstone), from the Late Cretaceous, 66 to 100 million years old.
The section below crosses 8 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.
Sandstone. Age: Late Cretaceous, 66 to 100 million years old. About 7 mi of the line.
Clay, marl. Age: Paleocene, 56 to 66 million years old. About 5 mi of the line.
Coarse-detrital, fine-detrital. Age: Holocene, less than 12,000 years old. About 4 mi of the line.
Marlstone. Age: Late Cretaceous, 66 to 100 million years old. About 2 mi of the line.
Coarse-detrital, fine-detrital. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
Marlstone. Age: Late Cretaceous, 66 to 100 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. 2 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 Washington reaches the Gulf of America by way of High Creek, Bois D'Arc Creek, the Red River, the Atchafalaya and the Lower Atchafalaya: about 540 river miles.
380 miles of the trip are on the Red River.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Washington; river miles along the main stem, rounded.
Washington has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 31° in January. About 56 inches of rain fall in a normal year, with about 2 inches of snow.
On November 14 Washington normally reaches 65° and falls to 41°. The record high is 85°, in 1955; the record low 16°, in 2019. The most rain on this date, 1.93 in, fell in 1926.
Normals 1991–2020 and records since 1892 at Hope 3 NE, 9 miles east-southeast. NOAA, through RCC-ACIS.
