The Sour John 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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16° on Nov. 12, 2019, the coldest reading for this week of the year since 1996. Next is 17° in 2014.
Sour John’s center stands about 800 ft above sea level. Within three miles the land runs from 480 ft to 910 ft, a difference of 430 ft: hilly country. The highest named summit within 15 miles is Pack Mountain, about 1,390 ft, 13 miles east.
Under the town center the state geologic map shows Atoka Formation (shale, sandstone), from the Carboniferous, 299 to 324 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 30×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 11 mi of the line.
Shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 5 mi of the line.
Coarse-detrital, fine-detrital. Age: Pleistocene, less than 2.6 million years old. About 3 mi of the line.
Fine-detrital. Age: Holocene, less than 12,000 years old. About 1 mi of the line.
Limestone, shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 1 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 Sour John reaches the Gulf of America by way of the Arkansas and the Mississippi: about 990 river miles.
Lakes on the way: Murray Lake and Ozark Lake.
600 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Sour John; river miles along the main stem, rounded.
Sour John has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 28° in January. About 43 inches of rain fall in a normal year.
On November 14 Sour John normally reaches 62° and falls to 39°. The record high is 81°, in 2025; the record low 21°, in 2018. The most rain on this date, 0.78 in, fell in 2020.
Normals 1991–2020 and records since 1996 at Muskogee Davis Field, 13 miles west-northwest, 200 ft lower. NOAA, through RCC-ACIS.
