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Glaciers remain year-round on some Cascade peaks higher than 7,000 feet (2,100 m) above sea level. [3] Annual snowfall along the coastal plain averages 1 to 3 inches (2.5 to 7.6 cm) a year, including years with none. Further inland, between the Coast Range and the Cascades, snowfall generally averages from 5 to 10 inches (13 to 25 cm) a year.
The amount of snow received at weather stations varies substantially from year to year. For example, the annual snowfall at Paradise Ranger Station in Mount Rainier National Park has been as little as 266 inches (680 cm) in 2014-2015 and as much as 1,122 inches (2,850 cm) in 1971–1972. [2]
This was the largest two-day snowfall recorded in Seattle since 1972. [49] The Portland metro area was hit very hard by the storm, which brought a mix of snow and ice to the region. [48] 9.4 inches (24 cm) of snow fell at Portland International Airport on February 12–13, the most snow to fall over this city in a two-day period since 1968. [49]
The snow, which is often very light and dry due to the desert climate, is referred to as "The Greatest Snow on Earth" in the mountains. Lake-effect snow contributes to approximately 6-8 snowfalls per year in Salt Lake City, with approximately 10% of the city's precipitation being contributed by the phenomenon. [26]
The snowstorm unloaded 10.8 inches of snow across the city on Wednesday, making Feb. 22 the second-snowiest day in Portland history, only behind the 14.4 inches that fell on Jan. 21, 1943.
The regional snowfall index (RSI) is a system used by NOAA to assess the societal impact of winter storms in the United States. The system is a replacement for the Northeast snowfall impact scale (NESIS) system. Since its initiation, the NCDC has retroactively assigned RSI values to over 500 historical storms since 1900.
The Rochester area has seen 32.9 inches of snow this season, which trails the normal year-to-date snowfall. This puts them ahead of perennial favorite Syracuse, with 26 inches, and Binghamton, 28. ...
In Oregon, snow fell in Troutdale, Tigard, Stayton, Cathedral Park, Chapman Square, and Beaverton, in which the latter received 9 inches (23 cm) of snow. [29] Portland recorded 10.8 inches (27 cm) of snow, their largest accumulation on record so late in the winter season and the second-largest calendar day observation in the city's history.