About starting Christmas 2021 heatwave in the USA we were informed here /https://mkweather.com/the-warmest-christmas-in-history-the-usa-hit-tropical-heatwaves-farms-and-ranches-in-texas-are-in-fire//.
Tropical or summer temperatures in Texas, Southeast and southern Midwest, wildfires in Texas, Oklahoma or Kansas, and anomalously warm weather across almost all territory of the USA excluding Northwest.
In the next days, until 28. December 2021, an abnormally warm, in the south hot air masses with origin in Mexico, will be shifting southward and eastward, while an extremely cold Arctic air will be shifting from Canada gradually more and more above the USA.
Along borders of both extreme air masses will create a very strong frontal boundary, which will be bringing according to current materials severe rounds of storms in the eastern half of the USA, especially the Midwest, and Southeast already around 28.-31. December 2021.
This round of storms should have some summer-like features and should bring derecho, hail, floods, or the next tornado outbreaks.
People in the central and eastern USA should in the next week watch current weather news, forecasts, warnings, and advisories, because the starting heatwave is anomalous, with record temperatures, while Arctic air above western Canada and gradually Northwest, the USA, will be extremely cold, with a result of a sharp boundary, with unseasonable powerful storm systems.
Storms will be gradually shifting from Upper Midwest and Great Lakes region southward, above southern Midwest, Mid-Atlantic, and Southeast, some storms should appear in the Northeast, too, but with a weaker intensity.
Conditions will be practically similar to during deadly extreme outbreaks in Kentucky or record storm round after the next heatwave, with the strongest US derecho since 2004 (links above), therefore will be prepared.
Mkweather will be furthermore bringing fresh news and forecasts from Europe, the USA, and the World.
Source: http://www.karstenhaustein.com/reanalysis/gfs0p5/ANOM2m_ntham/ANOM2m_f90_ntham.html
Source: wxcharts.com
