Digital illustration of bare deciduous tree branches. In the Northern Hemisphere, deciduous trees grow new leaves each Spring and lose their leaves each Autumn. Many trees have bare branches during the Winter months.
The continent of North America is located in the northern hemisphere and includes Canada, the United States, Mexico, the nations of Central America, Greenland, and the Caribbean Islands.
In the winter, a disruption in the polar vortex can occur as it tends to expand in the northern hemisphere, pushing that cold air further south.
Kaitlyn Schallhorn. Fox News. Tue, 18 Dec 2018 17:13:13 GMT.
Judah Cohen, who is a climate expert, said that the latest studies indicate there is a chance Arctic air could push southward and blanket much of the Northern Hemisphere in the coming weeks.
Daily Mail. Tue, 18 Dec 2018 13:43:54 GMT.