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Winter weather
Catch up with NBC News Clone on today's hot topic: Winter Weather - Breaking News | NBC News Clone. Our editorial team reformatted this story for clarity and speed.
The avalanche killed nine backcountry skiers in California's Sierra Nevada on Feb. 17, when a massive wall of snow plunged down a slope near Lake Tahoe. Six others survived.
Record winds are just one part of the extreme weather hitting the country this weekend, with some facing blizzard conditions and others preparing for triple-digit heat.
As heat blasts the Southwest, a polar vortex is forecast for the Midwest and East. Snow is expected in the Great Lakes, and an atmospheric river is on tap for Hawaii.
About 41 million people are under blizzard warnings as forecasters predict up to 2 feet of snow for some areas, 70 mph wind gusts and dangerous whiteout conditions overnight.
