The Palmyra 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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7° on Nov. 13, 2019, the coldest reading for this week of the year since 1937. Next is 8° in 1940.
Palmyra’s center stands about 620 ft above sea level. Within three miles the land runs from 480 ft to 680 ft, a difference of 200 ft: gently rolling country.
Under the town center the state geologic map shows Osagean Series (limestone), from the Carboniferous, 324 to 359 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 62×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 22 mi of the line.
Limestone, siltstone. Age: Carboniferous, 324 to 359 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 Palmyra reaches the Gulf of America by way of the North River and the Mississippi: about 1,300 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Palmyra; river miles along the main stem, rounded.
Palmyra has a hot-summer humid continental climate. Summer afternoons average 87° in July; winter nights fall to about 19° in January. About 36 inches of rain fall in a normal year.
On November 14 Palmyra normally reaches 53° and falls to 34°. The record high is 78°, in 1989; the record low 10°, in 1940. The most rain on this date, 0.51 in, fell in 1985.
Normals 1991–2020 and records since 1937 at Quincy Dam 21, 9 miles northeast, 140 ft lower. NOAA, through RCC-ACIS.
