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Hail is a form of solid precipitation. It is distinct from ice pellets, though the two are often confused. It consists of balls or irregular lumps of ice, each of which is called a hailstone. Ice pellets generally fall in cold weather, while hail growth is greatly inhibited during low surface temperatures.
A storm is any disturbed state of the natural environment or the atmosphere of an astronomical body. It may be marked by significant disruptions to normal conditions such as strong wind, tornadoes, hail, thunder and lightning, heavy precipitation, heavy freezing rain, strong winds, wind transporting some substance through the atmosphere such as in a dust storm, among other forms of severe weather.
Weather modification is the act of intentionally manipulating or altering the weather. The most common form of weather modification is cloud seeding, which increases rain or snow, usually for the purpose of increasing the local water supply. Weather modification can also have the goal of preventing damaging weather, such as hail or hurricanes, from occurring; or of provoking damaging weather against the enemy, as a tactic of military or economic warfare like Operation Popeye, where clouds were seeded to prolong the monsoon in Vietnam. Weather modification in warfare has been banned by the United Nations under the Environmental Modification Convention.
Cloud seeding is a type of weather modification that aims to change the amount or type of precipitation that falls from clouds by dispersing substances into the air that serve as cloud condensation or ice nuclei, which alter the microphysical processes within the cloud. Its effectiveness is debated; some studies have suggested that it is "difficult to show clearly that cloud seeding has a very large effect." The usual objective is to increase precipitation, either for its own sake or to prevent precipitation from occurring in days afterward.
Project Stormfury was an attempt to weaken tropical cyclones by flying aircraft into them and seeding with silver iodide. The project was run by the United States Government from 1962 to 1983. The hypothesis was that the silver iodide would cause supercooled water in the storm to freeze, disrupting the inner structure of the hurricane, and this led to seeding several Atlantic hurricanes. However, it was later shown that this hypothesis was incorrect. It was determined that most hurricanes do not contain enough supercooled water for cloud seeding to be effective. Additionally, researchers found that unseeded hurricanes often undergo the same structural changes that were expected from seeded hurricanes. This finding called Stormfury's successes into question, as the changes reported now had a natural explanation.
George Kourounis, is a Greek-Canadian adventurer and storm chaser who specializes in documenting extreme weather and worldwide natural disasters. He presents the television series Angry Planet.
The appearances of tropical cyclones in popular culture spans many genres of media and encompasses many different plot uses.
Michael Bettes is an American television meteorologist and storm chaser who works for The Weather Channel in Atlanta, Georgia. He was a co-host of AMHQ: America's Morning Headquarters. He hosts Weather Underground TV. Bettes has been an on-camera meteorologist for TWC since 2003, and is also an occasional fill-in weather anchor on The Today Show.
Supervolcano is a 2005 disaster docudrama television film directed by Tony Mitchell and written by Edward Canfor-Dumas. It is based on the speculated and potential eruption of the volcanic Yellowstone Caldera, located in Yellowstone National Park. The film stars an ensemble cast consisting of Michael Riley, Gary Lewis, Shaun Johnston, Adrian Holmes, Jennifer Copping, Rebecca Jenkins, Tom McBeath, Robert Wisden, Susan Duerden, Jane McLean, Sam Charles, and Kevin McNulty.
Vincent Joseph Schaefer was an American chemist and meteorologist who developed cloud seeding. On November 13, 1946, while a researcher at the General Electric Research Laboratory, Schaefer modified clouds in the Berkshire Mountains by seeding them with dry ice. While he was self-taught and never completed high school, he was issued 14 patents.
End Day is a 2005 docu-drama produced by the BBC. It aired on the National Geographic Channel, on the TV series, National Geographic Channel Presents, and BBC Three that depicts a set of five doomsday scenarios. The documentary follows the fictional scientist Dr. Howell, played by Glenn Conroy, as he travels from his London hotel room to his laboratory in New York City, and shows how each scenario affects his journey as well as those around him, with various experts providing commentary on that specific disaster as it unfolds. After each 'End Day' runs its course, the day repeats, this time with the next scenario panning out.
100 Biggest Weather Moments was a 2007 five-part miniseries on The Weather Channel, that premiered on Sunday, April 15, and aired nightly through Thursday, April 19, the biggest documentary effort in The Weather Channel's 25-year history.
Joshua Michael Aaron Ryder Wurman is an American atmospheric scientist and inventor noted for tornado, tropical cyclone, and weather radar research.
The following outline is provided as an overview of and topical guide to the field of Meteorology.
Project Earth is a 2008 reality TV series, hosted by Kevin O'Leary, Jennifer L. Languell, and Mocean Melvin, on the Discovery Channel in which several groups of scientists experiment with radical ideas to slow and/or stop global warming using geoengineering methods.
In meteorology, eyewall replacement cycles, also called concentric eyewall cycles, naturally occur in intense tropical cyclones, generally with winds greater than 185 km/h (115 mph), or major hurricanes. When tropical cyclones reach this intensity, and the eyewall contracts or is already sufficiently small, some of the outer rainbands may strengthen and organize into a ring of thunderstorms—a new, outer eyewall—that slowly moves inward and robs the original, inner eyewall of its needed moisture and angular momentum. Since the strongest winds are in a tropical cyclone's eyewall, the storm usually weakens during this phase, as the inner wall is "choked" by the outer wall. Eventually the outer eyewall replaces the inner one completely, and the storm may re-intensify.
Tropical convective clouds play an important part in the Earth's climate system. Convection and release of latent heat transports energy from the surface into the upper atmosphere. Clouds have a higher albedo than the underlying ocean, which causes more incoming solar radiation to be reflected back to space. Since the tops of tropical systems are much cooler than the surface of the Earth, the presence of high convective clouds cools the climate system.
The 1906 Florida Keys hurricane was a powerful and deadly hurricane that had a major impact on Cuba and southern Florida. The fifth hurricane and third major hurricane of the season, the storm formed from a system near Barbados on October 4. By October 8, it had intensified into a tropical storm, and made landfall as a hurricane in Central America. The hurricane traveled towards Cuba, making landfall and wreaking havoc on the island. The storm then made a third landfall in the Florida Keys during the evening of October 18. At least 240 people were killed as a result of the hurricane, and damages totaled at least $4,135,000.
Hurricane Sandy was an extremely destructive and strong Atlantic hurricane, as well as the largest Atlantic hurricane on record as measured by diameter, with tropical-storm-force winds spanning 1,150 miles (1,850 km). The storm inflicted nearly $70 billion in damage and killed 233 people across eight countries from the Caribbean to Canada. The eighteenth named storm, tenth hurricane, and second major hurricane of the 2012 Atlantic hurricane season, Sandy was a Category 3 storm at its peak intensity when it made landfall in Cuba, though most of the damage it caused was after it became a Category 1-equivalent extratropical cyclone off the coast of the Northeastern United States.