The Secor 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.
Sunny
Mostly sunny; warmer
Sunny
Partly cloudy
Mostly sunny
Partly cloudy
Partly cloudy
5° on Nov. 12, 2019, the coldest reading for this week of the year since 1935. Next is 12° in 1996.
Secor’s center stands about 740 ft above sea level. Within three miles the land runs from 660 ft to 750 ft, a difference of 90 ft: gently rolling country.
Under the town center the state geologic map shows Shelburn-Patoka Formations undivided (shale, limestone), from the Late Pennsylvanian, 304 to 307 million years old.
The section below crosses 2 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.
Shale, limestone. Age: Late Pennsylvanian, 304 to 307 million years old. About 14 mi of the line.
Shale, sandstone, limestone. Age: Late Pennsylvanian, 304 to 307 million years old. About 11 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 Secor reaches the Gulf of America by way of Panther Creek, the Mackinaw, the Illinois and the Mississippi: about 1,410 river miles.
1,190 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Secor; river miles along the main stem, rounded.
Secor has a hot-summer humid continental climate. Summer afternoons average 86° in July; winter nights fall to about 17° in January. A normal year brings about 22 inches of snow; with the rain, that comes to about 38 inches of water.
Normals 1991–2020 and records since 1935 at Congerville 2 NW, 10 miles southwest, 100 ft lower. NOAA, through RCC-ACIS.
