The Wynnburg 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
Mostly sunny; warmer
Sunny
Sunny
Mostly sunny
Mostly sunny
Mostly sunny
11° on Nov. 13, 2019, the coldest reading for this week of the year since 1924. Next is 14° in 1940.
Wynnburg’s center stands about 290 ft above sea level. Within three miles the land runs from 280 ft to 300 ft, a difference of 20 ft: nearly flat ground. The highest named summit within 15 miles is Fishgap Hill, about 510 ft, 15 miles northeast.
Under the town center the state geologic map shows Alluvial deposits (fine-detrital, coarse-detrital), from the Quaternary, less than 2.6 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 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.
Fine-detrital, coarse-detrital. Age: Quaternary, less than 2.6 million years old. About 14 mi of the line.
Silt. Age: Quaternary, less than 2.6 million years old. About 7 mi of the line.
Clay, silt, sand. Age: Holocene, less than 12,000 years old. About 4 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 Wynnburg reaches the Gulf of America by way of the Mississippi: about 890 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Wynnburg; river miles along the main stem, rounded.
Wynnburg has a humid subtropical climate. Summer afternoons average 87° in July; winter nights fall to about 26° in January. About 53 inches of rain fall in a normal year.
On November 14 Wynnburg normally reaches 59° and falls to 39°. The record high is 83°, in 1955; the record low 14°, in 2022. The most rain on this date, 1.48 in, fell in 1957.
Normals 1991–2020 and records since 1924 at Samburg W. L. Refuge, 13 miles northeast. NOAA, through RCC-ACIS.
