The Kupreanof 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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7.00 inches of rain fell in two days, the most for this week of the year since records began in 1924. The next wettest, 5.87 inches, fell in 1943.
Kupreanof’s center stands about 20 ft above sea level. Within three miles the land runs from 0 ft to 2,420 ft, a difference of 2,420 ft: mountain country. Open water lies within three miles. The highest named summit within 15 miles is Sherman Peak, about 3,800 ft, 6 miles north-northwest.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 6×.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR.
Kupreanof has a warm-summer humid continental climate. Summer afternoons average 62° in July; winter nights fall to about 27° in January. A normal year brings about 86 inches of snow; with the rain, that comes to about 110 inches of water.
On November 14 Kupreanof normally reaches 39° and falls to 32°. The record high is 58°, in 1976; the record low 9°, in 1955. The most rain on this date, 2.91 in, fell in 1944.
Normals 1991–2020 and records since 1924 at Petersburg 1, here. NOAA, through RCC-ACIS.
