What are westerlies?

The westerlies are big wind patterns that move air from west to east across most of the Earth.

Imagine you're playing with a toy car on a long, gently sloping road. The car rolls down the hill because it's going from a high place to a lower one, just like how winds move through the sky. Now picture the westerlies as a group of toy cars all rolling together, moving from west to east across the middle part of the Earth.

The Earth is warmed by the sun, and when parts of it get hot, the air above them rises up, like hot air from a toaster. This rising warm air creates space for cooler air to move in, and that’s where the westerlies come in. They’re like the cool air pushing the warm air along, creating steady wind patterns that we feel every day.

These winds help bring weather from one place to another, like a message being passed along a line of friends. If you live somewhere that gets regular rain or nice breezes, it might be because of the westerlies doing their job behind the scenes!