The Saginaw 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.
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89° on Nov. 15, 2025, the hottest reading for this week of the year since 1940. Next is 86° in 1950.
Saginaw’s center stands about 740 ft above sea level. Within three miles the land runs from 630 ft to 820 ft, a difference of 190 ft: gently rolling country. The highest named summit within 15 miles is Burton Knob, about 910 ft, 15 miles west-northwest.
Under the town center the state geologic map shows Fort Worth Limestone and Duck Creek Formation, undivided, from the Early Cretaceous, 100 to 145 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 47×. 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. Age: Early Cretaceous, 100 to 145 million years old. About 17 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Claystone. Age: Early Cretaceous, 100 to 145 million 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.
Marlstone, limestone. Age: Early Cretaceous to Late Cretaceous, 66 to 145 million years old. About 0.7 mi of the line.
Clay. Age: Early Cretaceous, 100 to 145 million years old. About 0.5 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 Saginaw reaches Galveston Bay and the Gulf of America by way of Little Fossil Creek, the West Fork Trinity and the Trinity: about 500 river miles.
Lake on the way: Woodlands Golf Course Lake.
270 miles of the trip are on the Trinity.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Saginaw; river miles along the main stem, rounded.
Saginaw has a humid subtropical climate. Summer afternoons average 96° in July; winter nights fall to about 35° in January. About 35 inches of rain fall in a normal year.
On November 14 Saginaw normally reaches 67° and falls to 46°. The record high is 86°, in 1999; the record low 22°, in 2018. The most rain on this date, 1.61 in, fell in 1994.
Normals 1991–2020 and records since 1940 at Fort Worth Meacham Field, 3 miles south. NOAA, through RCC-ACIS.
