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A winter weather advisory has been issued for Oregon’s Cascade mountain passes for an anticipated 10-14 inches of snow.. The National Weather Service advisory begins at 8 tonight and lasts until ...
Snow levels in the mountains will rise rapidly Wednesday, and travel will be impossible at the pass level due to blizzard conditions in the Cascades and far Northern California.
The first major snowstorm of the season dropped up to a foot (30 centimeters) of snow in the Helena, Montana, area by Wednesday, sending an army of snowplows and sand trucks out onto the roads.
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 western Cascades are older and more eroded than the lava plateau and prominent snow-covered cones of the High Cascades to the east. They are underlain by dark basalt in contrast to the gray andesite of the High Cascades. The region has lower temperatures and receives more winter snow than the lowlands and valleys to the west.
The North Cascades are a section of the Cascade Range of western North America.They span the border between the Canadian province of British Columbia and the U.S. state of Washington and are officially named in the U.S. and Canada [1] as the Cascade Mountains. [2]
New snow accumulation of 4 to 8 inches was forecast. Saturday travelers over the Cascade Mountains on I-90 were advised to be prepared for 3 to 7 inches of new snow and another 1 to 3 inches ...
On the western slopes, snowfall depths range from 50 to 75 in (130 to 190 cm) in lower altitudes annually, increasing to 400 to 600 in (1,000 to 1,500 cm) at elevations between 4,000 to 5,500 ft (1,200 to 1,700 m) above sea level. Snow depths peak in early March and range from 10 to 25 ft (3.0 to 7.6 m) depending on altitude. [113]