The Holtville 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
Partly cloudy; warmer
Partly cloudy
Sunny
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Mostly sunny
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86° on Nov. 11, 2020, the hottest reading for this week of the year since 1872. Next is 85° in 1896.
Holtville’s center stands about 350 ft above sea level. Within three miles the land runs from 250 ft to 430 ft, a difference of 180 ft: gently rolling country. The highest named summit within 15 miles is Bald Knob, about 580 ft, 10 miles southeast.
Under the town center the state geologic map shows High terrace deposits (sand), from the Pleistocene, less than 2.6 million 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 43×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand, clay. Age: Cretaceous, 66 to 145 million years old. About 6 mi of the line.
Sand. Age: Pleistocene, less than 2.6 million years old. About 6 mi of the line.
Mica-schist. Age: Precambrian to Paleozoic. About 5 mi of the line.
Sand, clay. Age: Cretaceous, 66 to 145 million years old. About 3 mi of the line.
Sand, clay. Age: Cretaceous, 66 to 145 million years old. About 3 mi of the line.
Mica-schist, phyllite. Age: Precambrian to Paleozoic. About 0.6 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 Holtville reaches Mobile Bay and the Gulf of America by way of Pigeonroost Creek, the Coosa, the Alabama and the Mobile: about 380 river miles.
Lake on the way: Lay Lake.
310 miles of the trip are on the Alabama.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Holtville; river miles along the main stem, rounded.
Holtville has a humid subtropical climate. Summer afternoons average 94° in July; winter nights fall to about 36° in January. About 51 inches of rain fall in a normal year.
On November 14 Holtville normally reaches 70° and falls to 43°. The record high is 85°, in 1993; the record low 26°, in 2013. The most rain on this date, 3.25 in, fell in 1921.
Normals 1991–2020 and records since 1872 from the Montgomery Area threaded record (Montgomery Airport, 23 miles south-southwest, 130 ft lower). NOAA, through RCC-ACIS.
