The polar vortex is a large ____ of very cold air that ____ near the North Pole high in the atmosphere. Most of the time, this cold ____ remains in the north, and people in Canada and the United States do not feel its strongest ____. However, the polar vortex is always moving and ____. Sometimes, the polar vortex becomes ____ and moves south. When this happens, cold Arctic air ____ into parts of Canada and the United States. Temperatures can ____ very quickly, and strong winds often make the weather feel even ____. This is called ____ chill, and it can make outdoor conditions dangerous. Places like Saskatchewan often ____ very cold winters. Because the land is ____ and open, cold air can move ____ across the Prairies. People living in Saskatchewan are used to extreme ____ and usually prepare by wearing warm clothing, heating their homes, and following winter safety ____. In contrast, Ontario usually has ____ winters. When a polar vortex reaches Ontario, the cold weather can feel surprising and ____ for many people. Even though these conditions may feel ____, the polar vortex is a ____ weather phenomenon. It is a normal part of winter ____ patterns in North America.

CLB 4-Polar Vortex

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?