The Jolmaville 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
Partly cloudy
Partly cloudy
Partly cloudy
Chance of showers
Showers likely
−8° on Nov. 17, 1959, the coldest reading for this week of the year since 1893. Next is −7° in 1956.
Jolmaville’s center stands about 760 ft above sea level. Within three miles the land runs from 720 ft to 930 ft, a difference of 210 ft: rolling country. The highest named summit within 15 miles is Mount Whittlesey, about 1,890 ft, 11 miles southeast.
Under the town center the state geologic map shows Oronto Group; Freda Sandstone (arkose, siltstone), from the Mesoproterozoic, 1 to 1.6 billion years old.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 18×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Arkose, siltstone. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 11 mi of the line.
Arkose. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 4 mi of the line.
Granite. Age: Mesoproterozoic, 1.1 to 1.1 billion years old. About 3 mi of the line.
Granodiorite, granite. Age: Mesoarchean to Neoarchean, 2.6 to 2.9 billion years old. About 2 mi of the line.
Sandstone, siltstone. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 2 mi of the line.
Conglomerate. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 2 smaller units along the line are not listed.
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 Jolmaville reaches Lake Superior by way of the Marengo and the Bad River: about 40 river miles. From there it moves on through the Great Lakes, over Niagara Falls and down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Jolmaville; river miles along the main stem, rounded.
Jolmaville has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 6° in January. About 28 inches of rain fall in a normal year.
On November 14 Jolmaville normally reaches 41° and falls to 25°. The record high is 64°, in 1990; the record low −2°, in 1940. The most rain on this date, 0.88 in, fell in 1951.
Normals 1991–2020 and records since 1893 from the Ashland Area threaded record (Ashland Kennedy Memorial Airport, 11 miles northwest). NOAA, through RCC-ACIS.
