Weather or Not

Day 3 - Global Patterns

By: harper mcdonald and piper stilwell

Trade winds

Trade winds blow between 30 degrees latitude and the equator in both hemispheres. They curve to to the west because of earth's rotation. Because of this, trade winds in the Northern Hemisphere come from the northeast and trade winds in the Southern Hemisphere come from the southeast.

Westerlies

Westerlies blow between 30 degrees and 60 degrees latitude in both hemispheres. The rotation of the earth causes causes the winds to blow to east, and so westerlies in the Northern Hemisphere come from the southwest ans westerlies in the Southern Hemisphere come from the northwest. Westerlies also carry moist air, causing precipitation and snow.

Polar easterlies

Polar easterlies blow between the poles and 60 degrees latitude in both hemispheres. They form as cold, sinking air moves from the poles towards 60 degrees North and 60 degrees South latitudes. They curve to the west due to earth's rotation. In the Northern Hemispheres, polar easterlies carry cold Arctic air over the majority of the U.S, producing snow and freezing weather.

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