The Lamar 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
Showers likely
Showers likely; cooler
Partly cloudy
Partly cloudy
Partly cloudy
Partly cloudy
89° on Nov. 16, 2011, the hottest reading for this week of the year since 1996. Next is 86° in 2005.
Lamar’s center stands about 10 ft above sea level. Within three miles the land runs from 0 ft to 30 ft, a difference of 30 ft: nearly flat ground. Open water lies within three miles.
Under the town center the state geologic map shows Barrier island deposits (sand), from the Pleistocene to Holocene, less than 2.6 million years old.
The section below crosses 5 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.
Sand. Age: Pleistocene, less than 2.6 million years old. About 6 mi of the line.
Clay, silt. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 1 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 1 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 0.4 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.
Rain that falls on Lamar runs straight into the Gulf of America.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Lamar; river miles along the main stem, rounded.
Lamar has a humid subtropical climate. Summer afternoons average 92° in August; winter nights fall to about 49° in January. About 28 inches of rain fall in a normal year.
Normals 1991–2020 and records since 1996 at Rockport Aransas County Airport, 5 miles south-southwest. NOAA, through RCC-ACIS.
