The Winkelman 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.
Partly cloudy
Sunny
Mostly sunny
Showers likely
Sunny
Mostly sunny
Mostly sunny; cooler
90° on Nov. 12, 1934, the hottest reading for this week of the year since 1900. Next is 89° in 1906.
Winkelman’s center stands about 1,960 ft above sea level. Within three miles the land runs from 1,900 ft to 2,990 ft, a difference of 1,090 ft: steep hill country. The highest named summit within 15 miles is El Capitan Mountain, about 6,530 ft, 15 miles north.
Under the town center the state geologic map shows Holocene river alluvium (sand, gravel), from the Holocene, less than 10,000 years old.
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 8×. 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, gravel. Age: Holocene, less than 10,000 years old. About 7 mi of the line.
Conglomerate, sandstone. Age: Early Miocene to Pleistocene, 2 to 16 million years old. About 5 mi of the line.
Basalt, andesite, dacite. Age: Middle Eocene to Late Miocene, 11 to 38 million years old. About 5 mi of the line.
Conglomerate, sandstone. Age: Early Oligocene to Late Miocene, 11 to 32 million years old. About 4 mi of the line.
Limestone, dolostone, quartzite. Age: Neoproterozoic to Early Triassic, 248 to 544 million years old. About 3 mi of the line.
Granite. Age: Mesoproterozoic, 1.4 to 1.4 billion years old. About 0.7 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 Winkelman reaches the Gulf of California by way of the Gila and the Colorado: about 460 river miles.
330 miles of the trip are on the Gila.
Often dry. About 60% of the way is mapped as streams that run only after rain or snowmelt; the water makes the whole trip in floods.
Seldom reaches the sea. Dams and canals now take nearly all of the Colorado before its old delta in Mexico.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Winkelman; river miles along the main stem, rounded.
Winkelman has a hot semi-arid climate. Summer afternoons average 99° in July; winter nights fall to about 31° in January. About 13 inches of rain fall in a normal year.
On November 14 Winkelman normally reaches 69° and falls to 39°. The record high is 89°, in 1906; the record low 22°, in 1938. The most rain on this date, 1.07 in, fell in 1968.
Normals 1991–2020 and records since 1900 at San Carlos Reservoir, 20 miles northeast, 570 ft higher. NOAA, through RCC-ACIS.
