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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]
The 6.1 in (15 cm) of snowfall in Portland, Oregon on February 12 ties the airport monthly record of 6.1 in (15 cm) set Feb 19, 1993. [106] The event proved to be historic for the Portland metropolitan area in the month of February. Some areas in Oregon saw up to 1.5 in (38 mm) of ice accretion. [107]
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 January 2012 Pacific Northwest snowstorm was a large extratropical cyclone that brought record snowfall to the Pacific Northwest in January 2012. [1] The storm produced very large snowfall totals, reaching up to 50 inches (1,300 mm) in Oregon. [2] A 110 mph (180 km/h) wind gust was reported at Otter Rock, Oregon. [3]
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.
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]
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