USA's wild weather: Heat, cold, hurricanes, tornadoes, floods -- the world's wildest weather -- How the sun causes weather: Where the sun shines starts all weather -- Why the winds blow: Air pressure differences put our weather on the move -- Storms, fronts: The battleground of weather -- What makes rain? Clouds, fog, rain, snow and sleet occur as water changes its form -- Floods, droughts: The extremes of the Earth's natural water cycle -- Snow and ice: An ordinary winter storm can turn into rain or a monster blizzard -- Thunderstorms and tornadoes: They are among nature's most destructive forces -- Hurricanes: Winds can top 150 mph, but the big danger is the storm surge -- Sky watching: Clouds, rainbows, halos and contrails -- How to predict the weather: How forecasts are made and how accurate they are -- future of Earth: Greenhouse effect and loss of ozone could be bringing bigger changes -- State-by-state records: Hottest, coldest, wettest and major weather events.
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