Severe weather

Severe Weather

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Severe weather

Severe weather phenomena are weather

Weather

Weather is a set of all the Phenomenon occurring in a given atmosphere at a given time. Weather phenomena lie in the hydrosphere and troposphere....
conditions that are hazardous to human life and property.

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Encyclopedia

Severe weather phenomena are weather

Weather

Examples Include:

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.

Cyclone
Cyclone

In meteorology, a cyclone refers to an area of closed, circular fluid motion rotating in the same direction as the Earth's rotation. This is usually characterized by inward spiraling winds that rotate counter clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere of the Earth....
(generic)

Arctic cyclone

Fog
Fog

Fog is a cloud bank that is in contact with the ground. A cloud may be considered partly fog; for example, the part of a cloud that is suspended in the air above the ground is not considered fog, whereas the part of the cloud that comes in contact with higher ground is considered fog....
Heat wave
Heat wave

A heat wave is a prolonged period of excessively hot weather, which may be accompanied by high humidity. There is no universal definition of a heat wave; the term is relative to the usual weather in the area....
Cold wave
Cold wave

A cold wave is a weather phenomenon that is distinguished by a cooling of the air. Specifically, as used by the National Weather Service, a cold wave is a rapid fall in temperature within a 24 hour period requiring substantially increased protection to agriculture, industry, commerce, and social activities....
Severe thunderstorm (hail
Hail

Hail is a form of Precipitation which consists of balls or irregular lumps of ice . Hailstones on Earth usually consist mostly of ice and measure between 5 and 150 millimeters in diameter, with the larger stones coming from severe thunderstorms....
storm, microburst
Microburst

A microburst is a very localized column of sinking air, producing damaging divergent and straight-line winds at the surface that are similar to but distinguishable from tornadoes which generally have convergent damage....
, doomcloud)

Supercell
Supercell

A supercell is a thunderstorm that is characterized by the presence of a mesocyclone; a deep, continuously-rotating vertical draft. Of the four classifications of thunderstorms , supercells are the largest and have the potential to be the most severe....
Derecho
Derecho

A derecho is a widespread and long-lived, violent convectively induced straight-line windstorm that is associated with a fast-moving band of severe thunderstorms usually taking the form of a bow echo....
Squall line
Squall line

A squall line is a line of thunderstorms#Severe_thunderstorm that can form along and/or ahead of a cold front. In the early 20th century, the term was used as a synonym for cold front....

Tornado
Tornado

A tornado is a violent, rotating column of air which is in contact with both the surface of the earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud....
(also colloquially referred to as a "whirlwind," "twister," or "deathspin")

Waterspout
Waterspout

A waterspout is an intense columnar vortex that occurs over a body of water and is connected to a cumuliform cloud. In the common form, it is a nonsupercell tornado over water, and brings the water upward....

Tropical cyclone
Tropical cyclone

A tropical cyclone is a storm characterized by a large low pressure system center and numerous thunderstorms that produce strong winds and flooding rain....
(also called a hurricane, typhoon, or "cyclone")
Windstorm (gradient pressure induced)

European windstorm
European windstorm

A European windstorm is a severe cyclone windstorm associated with areas of low pressure that track across the North Atlantic towards northwestern Europe....
s

Winter storm
Winter storm

A winter storm is an event in which the dominant varieties of precipitation are forms that only occur at cold temperatures, such as snow or sleet, or a rainstorm where ground temperatures are cold enough to allow ice to form ....

Blizzard
Blizzard

A blizzard is a severe winter storm condition characterized by low temperatures, strong winds, and heavy blowing snow. Blizzards are formed when a high pressure area, also known as a ridge, interacts with a low pressure area; this results in the advection of air from the high pressure zone into the low pressure area....
Ice storm
Ice storm

An ice storm is a type of winter storm characterized by freezing rain, also known as a glaze event or in some parts of the United States as a silver thaw....

Phenomena caused by non-thunderstorm severe weather include:

Avalanche
Avalanche

An avalanche is a rapid flow of snow down a slope, from either natural triggers or human activity. Typically occurring in mountainous terrain, an avalanche can mix air and water with the descending snow....
Very Heavy Snowfall
Blizzard

A blizzard is a severe winter storm condition characterized by low temperatures, strong winds, and heavy blowing snow. Blizzards are formed when a high pressure area, also known as a ridge, interacts with a low pressure area; this results in the advection of air from the high pressure zone into the low pressure area....
Drought
Drought

A drought is an extended period of months or years when a region notes a deficiency in its water supply. Generally, this occurs when a region receives consistently below average precipitation ....
Dust storm
Dust storm

A dust storm or sandstorm is a meteorological phenomenon common in arid and semi-arid regions and arises when a gust front passes or when the wind force exceeds the threshold value where loose sand and dust are removed from the dry surface....
, haboob
Haboob

File:Haboob, Taji, Iraq, 2006.JPGA haboob is a type of intense sandstorm commonly observed in the Sahara desert , as well as across the Arabian Peninsula, throughout Kuwait, and in the most arid regions of Iraq....
Landslide
Landslide

File:Guatemala landslide.jpgA landslide is a List of geological phenomena which includes a wide range of ground movement, such as rock falls, deep failure of slopes and shallow debris flows, which can occur in offshore, coastal and onshore environments....
, mudslide
Flood
Flood

A flood is an overflow of an expanse of water that submerges land, a deluge. In the sense of "flowing water", the word may also be applied to the inflow of the tide....
, flash flood
Flash flood

A flash flood is a rapid flooding of geomorphic low-lying areas - washes, rivers and streams. It is caused by heavy rain associated with a thunderstorm, hurricane, or tropical storm....
Wildfire
Wildfire

A wildfire is any uncontrolled, non-structure fire that occurs in the wilderness, wildland, or The Bush. Synonyms such as wildland fire, forest fire, brush fire, vegetation fire, grass fire, Peat#Fires, bushfire , and hill fire are commonly used....
, firestorm
Firestorm

A firestorm is a conflagration which attains such intensity that it creates and sustains its own wind system. It is most commonly a natural phenomenon, created during some of the largest bushfires, forest fires, and wildfires....
High Seas

Phenomena caused by severe thunderstorms:

Large Hail
Hail

Hail is a form of Precipitation which consists of balls or irregular lumps of ice . Hailstones on Earth usually consist mostly of ice and measure between 5 and 150 millimeters in diameter, with the larger stones coming from severe thunderstorms....
High winds - 58 mph or higher.
Tornadoes
Tornado

A tornado is a violent, rotating column of air which is in contact with both the surface of the earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud....
Deadly Lightning
Lightning

File:Blesk.jpgLightning is an Earth's atmosphere discharge of electricity usually accompanied by thunder, which typically occurs during thunderstorms, and sometimes during volcano or dust storms....
Flood
Flood

A flood is an overflow of an expanse of water that submerges land, a deluge. In the sense of "flowing water", the word may also be applied to the inflow of the tide....
, flash flood
Flash flood

A flash flood is a rapid flooding of geomorphic low-lying areas - washes, rivers and streams. It is caused by heavy rain associated with a thunderstorm, hurricane, or tropical storm....

Severe weather

Examples Include:

Phenomena caused by non-thunderstorm severe weather include:

Phenomena caused by severe thunderstorms:

See also

External links