The Greenfield 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
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5.28 inches of rain fell in two days, the most for this week of the year since records began in 1924. The next wettest, 3.74 inches, fell in 2015.
Greenfield’s center stands about 430 ft above sea level. Within three miles the land runs from 310 ft to 470 ft, a difference of 160 ft: gently rolling country. The highest named summit within 15 miles is Webb Mountain, about 620 ft, 15 miles southeast.
Under the town center the state geologic map shows Loess (silt), from the Quaternary, less than 2.6 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.
Silt. Age: Quaternary, less than 2.6 million years old. About 22 mi of the line.
Fine-detrital, coarse-detrital. Age: Quaternary, less than 2.6 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 Greenfield reaches the Gulf of America by way of the Middle Fork Obion, the Obion and the Mississippi: about 920 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Greenfield; river miles along the main stem, rounded.
Greenfield has a humid subtropical climate. Summer afternoons average 88° in July; winter nights fall to about 27° in January. About 54 inches of rain fall in a normal year.
On November 14 Greenfield normally reaches 59° and falls to 38°. The record high is 80°, in 1978; the record low 16°, in 1986. The most rain on this date, 1.54 in, fell in 1957.
Normals 1991–2020 and records since 1924 at Dresden, 11 miles north-northeast. NOAA, through RCC-ACIS.
