While central and eastern parts of the USA are suffering a winter heatwave with the worst gusting storms since 2004 and deadly tornadoes /https://mkweather.com/record-heatwaves-the-strongest-storms-since-2004-and-the-next-tornado-outbreak-december-in-the-usa/; https://mkweather.com/breaking-ef4-tornado-in-kentucky-killed-50-people-it-was-historic-winter-supercell/; https://mkweather.com/winter-tropical-heatwave-hits-the-usa-unseasonably-hot-from-the-south-to-the-north//, West is buried under the snow.
While into the eastern half of the USA will bring cooldown approximately only around 20. December 2021, Atmospheric River Level 3 is causing and is forecasted to bring extreme snowfall in Sierra Nevada, California, up to 2,5 meters / 8 feet.
Tamarack Ski Resort in Idaho reports 30 inches / 76 cm from the storm, so far.
In Wolf Creek, Colorado, and Brighton Crest in Salt Lake County, Utah, up to 30 inches, / 76 cm fell already before a week, around 10. December 2021.
The next significant snowfall is forecasted on West already before, during, and after Christmas 2021.
Significant snowfall is forecasted in parts of the Northeast, too, partly in Great Lakes region and Mid-Atlantic mountains, but Midwest and Northern Plains will stay relatively dry.
However, during Christmas, 24.-25. December 2021, a belt with snow precipitation is possible from California to New York state.
The long-term outlook is warmer for East and South and colder for West and North, so far /https://mkweather.com/ecmwf-6-week-forecast-for-the-usa-until-24-january-2022//.
Extremely cold winter conditions in North America are forecast mainly during the second half of Winter 2021/2022 /https://mkweather.com/winter-2021-2022-forecast-for-northern-hemisphere//.
Forecast snow cover in the USA from 14. and 16. December 2021 until the end of the year. Source: tropicaltidbits.com
Snowing at Christmas 2021 in the USA. Source: tropicaltidbits.com