The Jamestown 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
Mostly sunny
Sunny
Partly cloudy
Partly cloudy
Mostly sunny
77° on Nov. 11, 2020, the hottest reading for this week of the year since 1982. Next is 74° in 2010.
Jamestown’s center stands about 960 ft above sea level. Within three miles the land runs from 910 ft to 970 ft, a difference of 60 ft: gently rolling country.
Under the town center the state geologic map shows Borden Group (siltstone), from the Carboniferous, 324 to 359 million years old.
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.
Siltstone. Age: Carboniferous, 324 to 359 million years old. About 24 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 Jamestown reaches the Gulf of America by way of Big Walnut Creek, the Eel, the White River, Big Bayou, the Wabash River Old Channel, the Old Channel Wabash, the Ohio and the Mississippi: about 1,410 river miles.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Jamestown; river miles along the main stem, rounded.
Jamestown has a hot-summer humid continental climate. Summer afternoons average 83° 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 44 inches of water.
On November 14 Jamestown normally reaches 51° and falls to 32°. The record high is 71°, in 1999; the record low 7°, in 2019. The most rain on this date, 1.57 in, fell in 1993.
Normals 1991–2020 and records since 1982 at Crawfordsville 6 SE, 11 miles west-northwest, 120 ft lower. NOAA, through RCC-ACIS.
