Phenomenon What is It Usual Effects on Winter Weather in the United States Recent Years It Has Affected the Winter Other Remarks Arctic Oscillation (AO) A climate index of the state of the atmospheric circulation (winds) moving over and around the Arctic. When the AO is positive, a ring of strong winds circulating around the

What is the weather phenomenon known as La Niña, how is it different from El Nino, and what does it mean for our weather? Find out!

Here is a basic primer on hurricanes, tornadoes and storm surges, along with hurricane tips, information on the different categories of hurricanes, and a glossary of terms. Hurricanes A hurricane is a severe tropical storm, that forms in the southern Atlantic Ocean, Caribbean Sea, Gulf of Mexico, or in the eastern Pacific Ocean. Hurricanes need