The Hedley 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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90° on Nov. 17, 2021, the hottest reading for this week of the year since 1905. Next is 89° in 1995.
Hedley’s center stands about 2,620 ft above sea level. Within three miles the land runs from 2,490 ft to 2,720 ft, a difference of 230 ft: rolling country.
Under the town center the state geologic map shows Sand sheet deposits, from the Holocene, less than 12,000 years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 28×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand. Age: Late Miocene to Pliocene, 2.6 to 12 million years old. About 17 mi of the line.
Sandstone, shale. Age: Permian, 252 to 299 million years old. About 4 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 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 Hedley reaches the Gulf of America by way of the Salt Fork Red, the Red River, the Atchafalaya and the Lower Atchafalaya: about 1,260 river miles.
980 miles of the trip are on the Red River.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Hedley; river miles along the main stem, rounded.
Hedley has a cold semi-arid climate. Summer afternoons average 96° in July; winter nights fall to about 25° in January. About 22 inches of rain fall in a normal year.
On November 14 Hedley normally reaches 64° and falls to 36°. The record high is 88°, in 1988; the record low 10°, in 1916. The most rain on this date, 1.10 in, fell in 1924.
Normals 1991–2020 and records since 1905 at Memphis, 12 miles southeast, 560 ft lower. NOAA, through RCC-ACIS.
