The prevailing winds in the middle latitudes are often very strong. These parts of the world also see a wide variety of fast-changing weather as cold air masses from the poles and warm air masses from the tropics constantly push up and down over them against each other, sometimes alternating within hours of each other, especially in the roaring forties (latitudes between 40° and 50° in both hemispheres)[citation needed], even though the winds on the northern hemisphere are not as strong as in the southern hemisphere, due to the large landmasses of North America, Europe and Asia.[4]
^US Department of Commerce, National Oceanic and Atmospheric Administration. "What are the Roaring Forties?". oceanservice.noaa.gov. Retrieved 2023-01-19.