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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 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]
Snowfall data is much less reliable before the 1970s, but starting the data in the 1970s also meant the analysis included some exceptionally snowy years for that part of the US.
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.
Winter storms can produce both ice and snow, but are usually more notable in one of these two categories. The "Maximum accumulation" sections reflect the more notable category which is represented in inches of snow unless otherwise stated. Only category 1 and higher storms as defined by their regional snowfall index are included here.
Blizzard conditions were reported in Portland. Over a foot of snow was reported in portions of the state. [22] The fourth and final nor'easter occurred on March 20 to 22, with its focus further south in the Mid-Atlantic. Some areas saw their heaviest late-season snowfall on record, and approximately 100,000 lost power as a result of the storm. [24]
NOAA map shows when the average coldest day of the year typically occurs in the United States: From the Northern Plains to the Midwest, Southeast and Northeast, the last two weeks of January are ...