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Thunderstorms and Lightning

Also referred to as a lightning storm, a thunderstorm is a weather form wherein thunder and lightning are present. Thunderstorms, most especially if accompanied by heavy rains and downburst winds, pose hazards to people and the environment.

5,088 Questions

How do cold fronts form thunderstorms?

When a cold front moves through, the cold air mass acts like a wedge, lifting warmer air off the ground. If there is enough moisture and instability in the warm air mass, some of it may become freely buoyant and rise to form thunderstorms.

When the diaphragm contracts the air pressure increases or decreases?

When the diaphragm contracts, it decreases the pressure in the chest cavity, allowing air to rush into the lungs to inflate them. This creates an increase in air pressure outside the body as air is drawn in.

What is the difference between the spark and arc please?

A spark is formed when the electric field strength exceeds the dielectric field strength of air. Meaning that when an area of space's electronic strength exceeds the area surrounding it, a spark occurs to modulate or evenly distribute the electrical strength.

An Arc occurs when an highly conductive object with a high electrical charge is in the proximity of a highly conductive object with a low electrical charge, allowing the electrical field to travel through an area with lower conductive properties (such as air) to the object which is highly conductive but contains a lower charge than the other object. Rubbing your feet on a carpet and touching someone is a good example of this occurrence.

The difference in a spark and an arc is a spark is a singular occurrence which only needs a single particle to occur and in order to create or induce an Arc, two object are needed.

What tornadoes cause lightning?

Tornadoes themselves do not produce lightning. Lightning is typically associated with thunderstorms, which can be present in the same weather system as tornadoes. Lightning occurs due to the separation of positive and negative charges within a thunderstorm cloud.

What is an ice pellet with a diameter larger than 5 mm?

An ice pellet with a diameter larger than 5 mm is called a hailstone. Hailstones are formed when updrafts in thunderstorms carry water droplets high into the atmosphere where they freeze. As more water freezes onto the hailstone, it continues to grow in size until it eventually falls to the ground.

What is the name of the effect that describes how the pitch of a sound seems higher as it gets closer and lower as it gets farther away?

This is called the Doppler effect. Because air is compressible, that causes sound waves to lengthen the further you get from the source. This is also how radar speed detection works. The device calculates the rate of the Doppler shift to determine the speed of the car or other object being measured.

Who won yesterday mavs or thunder?

The Dallas Mavericks won yesterday's game against the Oklahoma City Thunder.

What is a ice pellet that is larger than 5 millimeters in diameter an occurs in a thunderstorm?

A hailstone is an ice pellet larger than 5 millimeters in diameter that forms in a thunderstorm due to updrafts carrying raindrops into extremely cold areas of the atmosphere where they freeze and accumulate layers of ice before falling to the ground.

Why are you drawn outside during a thunderstorm?

Being outside during a thunderstorm can be dangerous as lightning poses a significant risk of getting struck and potentially causing serious injury or even death. It is important to seek shelter indoors during a thunderstorm to stay safe.

Where are most storms concentrated at?

Most storms are concentrated in the tropics, particularly in regions around the equator such as the Caribbean, Gulf of Mexico, and western Pacific Ocean. These areas provide the warm ocean waters and atmospheric conditions that are conducive to the development of storms and hurricanes.

Why do thunderstorms produce damaging winds?

The primary cause of damaging winds in a thunderstorm is something called a downburst. This occurs when a mass of air within a thunderstorm cools and starts to fall. It hits the ground at great speed and spreads out horizontally, producing damaging winds that in some cases can be well over 100 mph.

What is a sheet lightning?

Sheet lightning is a type of lightning that illuminates the sky in a broad, diffuse manner without producing thunder. It is caused by the reflection and scattering of lightning off clouds and can create a flickering, sheet-like appearance across the sky.

What should you do if you are outside during a hailstorm?

Seek shelter immediately in a sturdy building or car to protect yourself from hail. Avoid seeking shelter under trees, as they can attract lightning. If shelter is not available, protect your head and seek cover in a low-lying area.

Why does st Elmo fires appear at the end of pointed objects such as masts of ships?

St. Elmo's fire occurs when the electric field around a pointed object, like the mast of a ship, ionizes the air and causes a blue or violet glow. The electric field is stronger around pointed objects, making them more likely to discharge in this way. This phenomenon is a form of corona discharge, often seen in thunderstorms or during volcanic eruptions.

When offers a person the least amount of protection during a lighting storm?

Standing under a tree offers the least protection during a lightning storm because the tree can be struck by lightning, leading to potential injury or harm for anyone nearby. It is safer to seek shelter indoors or in a structure with a lightning protection system.

What should you do if you are in a severe winter storm?

If you are in a severe winter storm, prioritize staying indoors in a safe and warm location. Have emergency supplies like food, water, blankets, and a flashlight on hand. Follow any warnings or advisories from local authorities and avoid unnecessary travel until the storm passes.

How do hailstones start?

Hailstones start as small ice particles in a thunderstorm's updraft. As they are carried upward by strong winds, they accumulate layers of water droplets that freeze onto them. These frozen particles continue to grow larger until they become too heavy for the updraft to support, falling to the ground as hailstones.

Is a lifting force part of the recipe for a thunderstorm to form?

You can have an unstable atmosphere with good potential for thunderstorms, but to actually trigger those storms you need something to start air moving upward.

Cool air rising through warm air

Has Western North Carolina ever been under a high risk of severe storms?

Yes. The extreme portions of western North Carolina were under a high risk outlook on November 15, 1989 and April 8, 1998.

In a few cases where one was issued not far from there:

On April 10, 2009 a high risk of severe weather was issued for parts of Tennessee, Alabama, and Georgia, coming very near the western tip of North Carolina. The western part of the state was under a moderate risk.

On April 16, 2011 a high risk of severe weather was issued for eastern North Carolina.

On April 27, 2011 a high risk of severe weather was issued for an area stretching across parts of Mississippi, Alabama, Georgia, and Tennessee, nearly reaching North Carolina. Part of western NC was under a moderate risk.

Why is lightning not used as a source of electricity for humans?

Lightning is not a reliable or controllable source of electricity for humans due to its unpredictability and intensity. The energy produced by lightning is also difficult to harness and capture efficiently. Additionally, the frequency and location of lightning strikes are not suitable for widespread electricity generation.

Are horses scared of thunder and lightning?

Horses can be scared of thunder and lightning due to their natural instincts as prey animals. The loud noises and bright flashes can startle and stress them. It is important to ensure their safety during storms by providing a secure shelter for them to seek refuge.

What is the most dangerous job on a boat during a storm?

The most dangerous job on a boat during a storm is likely being on deck performing tasks such as securing equipment, handling sails, or navigating in rough seas. The risk of being washed overboard or injured by strong winds and waves is significantly higher during storms.

What if lightning struck a concave mirror?

If lightning were to strike a concave mirror, the mirror would reflect the light just like any other object. However, since mirrors are designed to reflect light, the lightning strike would likely not cause any damage to the mirror itself. It is important to note that lightning strikes can be dangerous and should be avoided whenever possible.