Colorado, snow
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Avalanche danger in the northern, central and southern mountains is spiking as new snow and high winds bury a weak snowpack
Travel on I-70 through the mountains will rapidly deteriorate after 6 a.m. as strong winds and snow spread eastward across Colorado’s mountains,” weather service forecasters
Colorado avalanche officials are warning backcountry travelers that avalanche danger will increase ahead of the Presidents Day weekend, which historically has been one of the busiest weekends for avalanche accidents.
Then there needs to be a trigger. A snowpack may be seemingly stable until a snowmobile or skier disturbs it enough that the snow starts to move. Strong winds or rock falls may also cause an avalanche. Blowing snow can create wind loading and build up into cornices, creating an overhang that can eventually fall and trigger an avalanche below.