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
Below are some common and uncommon weather terms that are used in the Farmers’ Almanac and on our website. Absolute Zero — The temperature at which all molecular motion ceases, equal to -459.67 degrees Fahrenheit or -273.16 degrees Celsius. Anemometer — An instrument for measuring wind force and speed. Aurora, or Aurora Borealis — Also
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
If you’re on or near large bodies of water, you should know what the following marine weather warnings mean, and what actions to take to remain safe. But first, a marine primer: What’s the difference between “miles per hour” and “knots per hour”? 1 knot = 1 nautical mile per hour = 6,076 feet per