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A thunderstorm, also known as an electrical storm or a lightning storm, is a storm characterized by the presence of lightning [1] and its acoustic effect on the Earth's atmosphere, known as thunder. [2] Relatively weak thunderstorms are sometimes called thundershowers. [3] Thunderstorms occur in a type of cloud known as a cumulonimbus. [4]
The clouds are thin enough for the sun to be visible through them. These high cirrus clouds may be the first signs of an approaching tropical cyclone. [8] As air parcels are lifted within the eye of the storm the vorticity is reduced, causing the outflow from a tropical cyclone to have anticyclonic motion. If two tropical cyclones are in ...
Poor air quality can also cause some symptoms such as difficulty breathing, coughing, and headaches. [8] Typically pollutants irritate the respiratory system and trigger respiratory conditions such as asthma and chronic bronchitis that make it difficult for them to go outside. During air stagnation events, it is recommended for children, elders ...
Absolute humidity is defined as water mass per volume of air. A given mass of air will grow or shrink as the temperature or pressure varies. So the absolute humidity of a mass of air will vary due to changes in temperature or pressure, even when the proportion of water in that mass of air (its specific humidity) remains constant.
Humidity occurs in indoor environments due to building related causes. Porous walls, rising damp, and leaks in the building are determinants for structural dampness due to elevated humidity levels. [ 4 ] : 185–187 The construction of the building can also lead to humidity and unwanted moisture in the indoor environment. [ 15 ]
Outflow boundary on radar with radial velocity and frontal boundary drawn in.. An outflow boundary, also known as a gust front, is a storm-scale or mesoscale boundary separating thunderstorm-cooled air from the surrounding air; similar in effect to a cold front, with passage marked by a wind shift and usually a drop in temperature and a related pressure jump.
An insurance policy may or may not cover the costs associated with water damage and the process of water damage restoration. While a common cause of residential water damage is often the failure of a sump pump, many homeowner's insurance policies do not cover the associated costs without an addendum which adds to the monthly premium of the policy.
Dry thunderstorms occur essentially in dry conditions, and their lightning is a major cause of wildfires. [ 3 ] [ 4 ] [ 5 ] Because of that, the United States National Weather Service , and other agencies around the world, issue forecasts for its likelihood over large areas.