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Weather is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy. [1] On Earth, most weather phenomena occur in the lowest layer of the planet's atmosphere, the troposphere, [2] [3] just below the stratosphere.
Severe weather can occur under a variety of situations, but three characteristics are generally needed: a temperature or moisture boundary, moisture, and (in the event of severe, precipitation-based events) instability in the atmosphere.
Severe weather is any dangerous meteorological phenomenon with the potential to cause damage, serious social disruption, or loss of human life. [ 1 ] [ 2 ] [ 3 ] These vary depending on the latitude , altitude , topography , and atmospheric conditions.
Generally speaking, one event in extreme weather cannot be attributed to any one single cause. However, certain system wide changes to global weather systems can lead to increased frequency or intensity of extreme weather events. [5] Climate change is making some extreme weather events more frequent and more intense.
Some climate scientists think a new term for the most extreme weather may be needed because the usual way of characterizing the events fails to capture how they keep getting more dramatic.
Weather modification is the act of intentionally manipulating or altering the weather.The most common form of weather modification is cloud seeding, which increases rainfall or snowfall, usually for the purpose of increasing the local water supply. [1]
In a summer marked by deadly flash flooding, extreme drought, wildfires and unprecedented heat waves, a new report concludes that weather-related disasters are occurring four to five times more ...
This causes the partial or complete melting of any snowflakes falling through the warm layer. As they fall back into the sub-freezing layer closer to the surface, they re-freeze into ice pellets. However, if the sub-freezing layer beneath the warm layer is too small, the precipitation will not have time to re-freeze, and freezing rain will be ...