DENVER (CBS) – Our current weather pattern is delivering a one or two punch for thick mountain snow into Colorado. The big player is the “Atmospheric River” of moisture entrained by the jet stream rolling under a large low-pressure trench in the Pacific Ocean.
This current is winding through Hawaii straight into California. When this happens, it is also sometimes referred to as “Pineapple Express”! This can bring tons of moisture into our state. That alone was enough for heavy snowfall. However, the river is also partnering with an Alaskan storm that is making landfall south along the west coast. Thus, double whales attacked the Rockies until Christmas morning.
Many mountainous areas are still expecting 1 to 2 meters of snow on Friday. Including Rocky Mountain National Park into the Rabbit Ears area and more. Summit County to Winter Park is getting 6 to 14 inches of snow. With winds of 50 to 60 mph driving through high water can be very dangerous from Thursday night through Friday morning.
The Warning and Advisory extends south to the San Juan Mountains and parts of the Sangre De Cristo Mountains.
With large amounts of snow blown by the wind, weak thick sheets of snow are expected to be created on some mountain slopes in remote areas with this storm. As a result, an Avalanche Warning was posted for the northern, central, and southwestern avalanche areas of the Colorado mountains.
The Denver metro area, suburbs and northern plains are likely to see some isolated rain from and through Friday. With the best chance occurring in the afternoon when the cold front passes.
https://denver.cbslocal.com/2021/12/23/colorado-weather-the-pineapple-express-buries-colorado-mountains/ Pineapple Express Buries Colorado Mountains – CBS Denver