The Bunker 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.
Mostly sunny
Partly cloudy; warmer
Sunny
Sunny
Mostly sunny
Partly cloudy
Mostly sunny
83° on Nov. 16, 2025, the hottest reading for this week of the year since 1893. Next is 80° in 2010.
Bunker’s center stands about 1,390 ft above sea level. Within three miles the land runs from 1,080 ft to 1,380 ft, a difference of 300 ft: rolling country.
Under the town center the state geologic map shows Roubidoux Formation (sandstone, chert), from the Early Ordovician, 471 to 487 million 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 32×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 18 mi of the line.
Dolostone. Age: Cambrian, 487 to 497 million years old. About 4 mi of the line.
Sandstone, chert. Age: Early Ordovician, 471 to 487 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.
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 Bunker reaches the Gulf of America by way of Gordon Creek, Sinking Creek, the Current, the Black River, the White River and the Mississippi: about 1,140 river miles.
620 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Bunker; river miles along the main stem, rounded.
Bunker has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 20° in January. A normal year brings about 6 inches of snow; with the rain, that comes to about 49 inches of water.
Normals 1991–2020 and records since 1893 at Round Spring 2 SW, 18 miles southwest, 560 ft lower. NOAA, through RCC-ACIS.
