The Grenada 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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74° on Nov. 14, 1995, the hottest reading for this week of the year since 1893. Next is 74° in 1996.
Grenada’s center stands about 2,560 ft above sea level. Within three miles the land runs from 2,500 ft to 3,230 ft, a difference of 730 ft: hilly country. The highest named summit within 15 miles is Miller Mountain, about 7,070 ft, 15 miles east.
Under the town center the state geologic map shows Quaternary alluvium and marine deposits (coarse-detrital), 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 6×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Andesite, basalt. Age: Late Oligocene to Pleistocene, 2 to 24 million years old. About 7 mi of the line.
Schist, gneiss. Age: Paleoproterozoic to Cretaceous, 66 to 2,500 million years old. About 7 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 5 mi of the line.
Phyllite. Age: Ordovician to Early Devonian, 394 to 487 million years old. About 4 mi of the line.
Dacite, andesite. Age: Pleistocene to Holocene, less than 2.6 million 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.
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 Grenada reaches the Pacific Ocean by way of the Shasta and the Klamath: about 200 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Grenada; river miles along the main stem, rounded.
Grenada has a hot-summer Mediterranean climate. Summer afternoons average 93° in July; winter nights fall to about 27° in January. A normal year brings about 12 inches of snow; with the rain, that comes to about 19 inches of water.
On November 14 Grenada normally reaches 54° and falls to 31°. The record high is 74°, in 1995; the record low 9°, in 1916. The most rain on this date, 1.22 in, fell in 1981.
Normals 1991–2020 and records since 1893 at Yreka, 7 miles west-northwest, 150 ft higher. NOAA, through RCC-ACIS.
