They use the earth's natural weather patterns and drive it with their HAARP and other technologies. The overall heat of the planet stays relatively the same (based on 11 year solar cycles), but the variations can be moved around by heating the ionosphere in key locations. Here on the west coast of Canada where I've experienced the weather for 61 years, the wind always comes from the west, and only during the day when the ocean reflects the suns rays and helps to heat the air. There's always cold fronts coming from the Arctic in the winter. They will take advantage of natural patterns like that. By artificially heating the southern hemisphere, the cold and precipitation increases in the northern hemisphere, and visa versa. Almost all of the earth's land mass is in the northern hemisphere. That means that the artificial heat created in the southern hemisphere during the northern hemisphere's winter season is over the oceans and isn't as noticeable. This might be one of the reasons why top members of the Deep State routinely travel to the Antarctic.