On the southern edge of frontal wave with primary pressure low and cold front, next, secondary, cyclonic system has developed and during Silvester and New Year is shifting northeastward, from Texas above Midwest and then Northeast, with next storms and snowfall.
On the back sides of both systems, extremely cold air has shifted / will shift above parts of the USA and Mexico, with results of anomalous coldwave, e.g. with snowing in Texas and extreme frosts in Colorado.
Extreme frosts already has reported Antero Reservoir, Colorado on Wednesday, 30. December 2020 – only -50°F / -45,6°C, what is 4th lowest temperature in Colorado since modern measures began (1961). Absolute record from 1985 for Colorado is -61°F / -51,7°C, Weather Nation informed.
A new pressure low above southern USA brought last hours heavy snowfall into northern and western parts of Texas, while in western and northern parts of Midwest and in Great Lakes area is expected additional snowfall (the worst snowfall was reported on 29.-30. December during transition of primary pressure low with a cold front).
During the first half of January 2020, several, more little cyclones is expected above central and eastern USA, with possible local storms with flash floods or heavy snowfall.
More interesting, however, will be a situation on the west coast of USA and Canada, where atmospheric river unseen dimensions will bringing severe rains and snowfall, with high risk of floods and landslides.
Minimum temperatures on 30., 31. December 2020 and 1. January 2021 in the USA /meteologix.comCurrent snow cover in the USA /wxcharts.com16-day snow forecast for the USA /tropicaltidbits.comPrimary and secondary pressure low on frontal wave across the USA around 30. December 2020 /wxcharts.comNew Year 2021 forecast for the USA /wxcharts.com
Some parts of Iowa picked up 7" of snow already, with more on the way for the Midwest heading into New Years Eve! Stay warm and safe everyone. #iawxpic.twitter.com/3oHoLdHfQZ
TEXAS SNOW: Parts of West Texas are closing out 2020 with several inches of snow. Here is a look at the Fort Stockton area Thursday morning. pic.twitter.com/snfZL3SVsU
Overtime – Winter storm that dumped 8 inches of snow in parts of the Midwest brings extra work hours for tow ops. "Usually when people call us, they're having a bad day, and we understand that." https://t.co/rphN8hc7c9pic.twitter.com/WTbo9JrMeE
Even parts of #Illinois had to bring out the snow plows for the system moving through the midwest earlier in the night on Tuesday. #ILWXpic.twitter.com/iK4aaVouZU
Here we go again: Midwest prepares to be battered by huge winter storm that will dump up to 24 inches of snow before barreling onto the East Coast bringing New Year's Eve misery to 40M https://t.co/jNNhGyLhRCpic.twitter.com/5K7LcXjisf
The last day of the year will end in classic #2020 fashion as a dangerous winter storm unleashes its fury across the #Midwest and South. Snow, ice and destructive storms are all on the table. Read Thursday's Weather Outlook: https://t.co/BkYKAtPPn9pic.twitter.com/OOo2ftHjJp
Motorists heading out from western and central Texas, northward to portions of the central Plains, Midwest and Northeast this weekend may still face travel troubles in the wake of the big storm that brought snow and/or ice over a 2,200-mile long swath: https://t.co/wk7gV0V58Wpic.twitter.com/mduqn4Kuup
— Breaking Weather by AccuWeather (@breakingweather) December 31, 2020
Here is a Radar Update! Snow showers are moving through the Northeast. The latest major winter storm is moving through the Plains and the Midwest. This winter storm is producing snow, sleet, freezing rain, rain and wind. The next winter storm is moving into the Northwest. pic.twitter.com/sz9Fo8F59r
Swath of snow and ice accumulations are still forecast from southwest Texas through the Plains/Midwest, and into the Northeast as we end 2020 & ring in 2021. Latest @NWS forecast for wintry precipitation up to Sunday morning, 3 Jan 2021. pic.twitter.com/MsBw8bm52x
2020's parting shot: Huge coast-to-coast storm will blanket the Midwest with two-feet of snow before blasting the Northeast with rain and wind on New Year's Eve and bring chilly temperatures to Florida https://t.co/bdGg51iO3e
12/30 6 PM ET – What a way to ring in 2021 for the Great Lakes, Midwest, Mid Atlantic, and Northeast as a complex storm system produces snow, sleet, freezing rain, and rain late Friday morning into Saturday. While most locations won't see all 4 types of p…https://t.co/tclvNy3nto