The Jarrell 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.
Chance of showers
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Mostly cloudy
Mostly sunny; warmer
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24° on Nov. 13, 2013, the coldest reading for this week of the year since 1980. Next is 24° in 2018.
Jarrell’s center stands about 870 ft above sea level. Within three miles the land runs from 740 ft to 920 ft, a difference of 180 ft: gently rolling country. The highest named summit within 15 miles is Hickman Knob, about 1,110 ft, 14 miles west.
Under the town center the state geologic map shows Austin Chalk (marlstone, chalk), from the Late Cretaceous, 66 to 100 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 39×. 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, dolostone. Age: Early Cretaceous, 100 to 145 million years old. About 9 mi of the line.
Marlstone, chalk. Age: Late Cretaceous, 66 to 100 million years old. About 7 mi of the line.
Siltstone-mudstone. Age: Late Cretaceous, 66 to 100 million years old. About 6 mi of the line.
Limestone, shale. Age: Early Cretaceous, 100 to 145 million years old. About 1 mi of the line.
Limestone, marlstone. Age: Early Cretaceous, 100 to 145 million years old. About 1 mi of the line.
Limestone. Age: Late Cretaceous, 66 to 100 million years old. About 0.7 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 Jarrell reaches the Gulf of America by way of Salado Creek, the Little River and the Brazos: about 440 river miles.
320 miles of the trip are on the Brazos.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Jarrell; river miles along the main stem, rounded.
Jarrell has a humid subtropical climate. Summer afternoons average 97° in August; winter nights fall to about 36° in January. About 37 inches of rain fall in a normal year.
On November 14 Jarrell normally reaches 70° and falls to 47°. The record high is 86°, in 2006; the record low 26°, in 2018. The most rain on this date, 0.41 in, fell in 1998.
Normals 1991–2020 and records since 1980 at Georgetown Lake, 12 miles southwest. NOAA, through RCC-ACIS.
