#atmospheric_phenomenon__atmosphericphenomenon a physical phenomenon associated with the atmosphere
supertype: physical_phenomenon a natural phenomenon involving the physics of matter and energy
subtype: cloud.atmospheric_phenomenon a visible mass of water or ice particles suspended at a considerable altitude
subtype: cirrocumulus_cloud__cirrocumulus a cloud at a high altitude consisting of a series of regularly arranged small clouds resembling ripples
subtype: cirrostratus_cloud__cirrostratus a thin uniform layer of hazy cloud at high altitude
subtype: cirrus_cloud__cirrus a wispy white cloud (usually of fine ice crystals) at a high altitude (4 to 8 miles)
subtype: mare's_tail a long narrow flowing cirrus cloud
subtype: cloud_bank__cloudbank a layer of clouds seen from a distance
subtype: contrail__condensation_trail an artificial cloud created by an aircraft; caused either by condensation due to the reduction in air pressure above the wing surface or by water vapor in the engine exhaust
subtype: cumulonimbus_cloud__cumulonimbus__thundercloud a dark cloud of great vertical extent charged with electricity; associated with thunderstorms
subtype: cumulus_cloud__cumuluscloud__cumulus__cumulu a globular cloud
subtype: altocumulus_cloud__altocumuluscloud__altocumulus__altocumulu a cumulus cloud at an intermediate altitude of 2 or 3 miles
subtype: nimbus_cloud__nimbus__rain_cloud a dark gray cloud bearing rain
subtype: storm_cloud__stormcloud a heavy dark cloud presaging rain or a storm
subtype: stratus_cloud__stratuscloud__stratus__stratu a large dark low cloud
subtype: altostratus_cloud__altostratuscloud__altostratus__altostratu a stratus cloud at an intermediate altitude of 2 or 3 miles
subtype: air_pocket__airpocket a local region of low pressure or descending air that causes a plane to lose height suddenly
subtype: aurora an atmospheric phenomenon consisting of bands of light caused by charged solar particles following the earth's magnetic lines of force
subtype: aurora_australis__southern_lights the aurora of the southern hemisphere
subtype: aurora_borealis__northern_lights the aurora of the northern hemisphere
subtype: condensate__condensation atmospheric moisture that has condensed because of cold
subtype: sweat condensation of moisture on a cold surface; "the cold glasses were streaked with sweat"
subtype: dew water that has condensed on a cool surface overnight from water vapor in the air; "in the morning the grass was wet with dew"
subtype: front.atmospheric_phenomenon (meteorology) the atmospheric phenomenon created at the boundary between two different air masses
subtype: warm_front the front of an advancing mass of warmer air
subtype: cold_front__polar_front__polarfront the front of an advancing mass of colder air
subtype: squall_line a cold front along which squalls or thunderstorms are likely
subtype: occluded_front__occlusion (meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft
subtype: greenhouse_effect warming that results when solar radiation is trapped by the atmosphere; caused by atmospheric gases that allow sunshine to pass through but absorb heat that is radiated back from the warmed surface of the earth
subtype: inversion the layer of air near the earth is cooler than an overlying layer
subtype: violent_storm__violentstorm__storm a violent weather condition with winds 64-72 knots (11 on the Beaufort scale) and precipitation and thunder and lightening
subtype: firestorm a storm in which violent winds are drawn into the column of hot air rising over a severely bombed area
subtype: storm_center__stormcenter the central area or point of lowest barometric pressure within a storm
subtype: northeaster__noreaster a storm blowing from the northeast
subtype: hailstorm a storm during which hail falls
subtype: ice_storm__icestorm__silver_storm a storm with freezing rain that leaves everything glazed with ice
subtype: rainstorm a storm with rain
subtype: line_storm__equinoctial_storm__equinoctialstorm a violent rainstorm near the time of an equinox
subtype: thundershower a short rainstorm accompanied by thunder and lightning
subtype: blizzard__snowstorm a storm with widespread snowfall accompanied by strong winds
subtype: thunderstorm__electrical_storm__electric_storm a storm resulting from strong rising air currents; heavy rain or hail along with thunder and lightning
subtype: windstorm a storm consisting of violent winds
subtype: cyclone a violent rotating windstorm
subtype: hurricane a severe tropical cyclone usually with heavy rains and winds moving a 73-136 knots (12 on the Beaufort scale)
subtype: tornado__twister a localized and violently destructive windstorm occurring over land characterized by a funnel-shaped cloud extending toward the ground
subtype: waterspout.tornado a tornado passing over water and picking up a column of water and mist
subtype: typhoon a tropical cyclone occurring in the W Pacific or Indian oceans
subtype: dust_storm__sandstorm__sirocco a windstorm that lifts up clouds of dust or sand
subtype: tempest (literary) a violent wind; "a tempest swept over the island"
subtype: whirlwind a more or less vertical column of air whirling around itself as it moves over the surface of the Earth
subtype: dust_devil a miniature whirlwind strong enough to whip dust and leaves and litter into the air
subtype: atmospheric_electricity__atmosphericelectricity electrical discharges in the atmosphere
subtype: elves__elve an acronym for Emissions of Light and Very low frequency perturbations due to Electromagnetic pulse Sources; extremely bright extremely short (less than a msec) electrical flashes forming a huge ring (up to 400 km diameter) in the ionosphere
subtype: blue_jets__jets atmospheric discharges (lasting 10 msec) bursting from the tops of giant storm clouds in blue cones that widen as they flash upward
subtype: lightning abrupt electric discharge from cloud to cloud or from cloud to earth accompanied by the emission of light
subtype: forked_lightning__chain_lightning__chainlightning a form of lightning that moves rapidly in a zigzag path with one end divided (fork-like)
subtype: bolt_of_lightning__thunderbolt__bolt a discharge of lightning accompanied by thunder
subtype: red_sprites__redsprite__sprites__sprite atmospheric electricity (lasting 10 msec) appearing as globular flashes of red (pink to blood-red) light rising to heights of 60 miles (sometimes seen together with elves)
subtype: midnight_sun the sun visible at midnight (inside the arctic or antarctic circles)
subtype: halo a circle of light around the sun or moon
subtype: solar_halo__solarhalo__parhelic_circle__parhelic_ring a luminous halo parallel to the horizon at the altitude of the sun; caused by ice crystals in the atmosphere
subtype: meteor_shower__meteor_stream a transient shower of meteors when a meteor swarm enters the earth's atmosphere
subtype: sunrise.atmospheric_phenomenon atmospheric phenomena accompanying the daily appearance of the sun
subtype: sunset.atmospheric_phenomenon atmospheric phenomena accompanying the daily disappearance of the sun
subtype: afterglow.atmospheric_phenomenon a glow sometimes seen in the sky after sunset
subtype: weather_condition__weathercondition__weather__atmospheric_condition__atmosphericcondition the meteorological conditions: temperature and wind and clouds and precipitation; "they were hoping for good weather"; "every day we have weather conditions and yesterday was no exception"
subtype: cold_weather__cold_snap__cold_wave__cold_spell a period of unusually cold weather
subtype: frost__freeze weather cold enough to cause freezing
subtype: fair_weather__sunshine__temperateness__temperatenes moderate weather; suitable for outdoor activities
subtype: hot_weather__hotweather__heat_wave__hot_spell__hotspell a period of unusually hot weather
subtype: scorcher an extremely hot day
subtype: sultriness oppressively hot and humid weather
subtype: thaw__thawing__warming warm weather following a freeze; snow and ice melt; "they welcomed the spring thaw"
subtype: precipitation__downfall the falling to earth of rain or snow or hail or sleet or mist
subtype: fine_spray precipitation in very small drops
subtype: hail precipitation of ice pellets when there are strong rising air currents
subtype: rainfall__rain water falling in drops from vapor condensed in the atmosphere
subtype: monsoon.wind any wind that changes direction with the seasons
subtype: rainstorm a storm with rain
subtype: downpour__cloudburst__deluge__waterspout__torrent__soaker a heavy rain
subtype: drizzle very light rain; stronger than mist but less than a shower
subtype: rain_shower__shower a brief period of precipitation; "the game was interrupted by a brief shower"
subtype: scattering.rain_shower__sprinkle__sprinkling a light shower that falls in some locations and not others nearby
subtype: sleet partially melted snow (or a mixture of rain and snow)
subtype: snowfall__snow precipitation falling from clouds in the form of ice crystals
subtype: snow_flurry__flurry a light brief snowfall and gust of wind (or something resembling that); "he had to close the window against the flurries"; "there was a flurry of chicken feathers"
subtype: whiteout an arctic atmospheric condition with clouds over snow produce a uniform whiteness and objects are difficult to see; occurs when the light reflected off the snow equals the light coming through the clouds
subtype: virga light wispy precipitation that evaporates before it reaches the ground (especially when the lower air is low in humidity)
subtype: elements violent or severe weather (viewed as caused by the action of the four elements); "they felt the full fury of the elements"
subtype: wind air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure; "trees bent under the fierce winds"; "when there is no wind, row"
subtype: airstream a relatively well-defined prevailing wind
subtype: jet_stream__jetstream a high-speed high-altitude airstream blowing from west to east near the top of the troposphere; has important effects of the formation of weather fronts
subtype: calm_air wind moving at less than 1 knot; 0 on the Beaufort scale
subtype: zephyr__breeze__gentle_wind__air a slight wind (usually refreshing); "the breeze was cooled by the lake"; "as he waited he could feel the air on his neck"
subtype: sea_breeze__seabreeze a cooling breeze from the sea (during the daytime)
subtype: breath.zephyr a slight movement of the air; "there wasn't a breath of air in the room"
subtype: light_air__lightair wind moving 1-3 knots; 1 on the Beaufort scale
subtype: light_breeze__lightbreeze wind moving 4-7 knots; 2 on the Beaufort scale
subtype: gentle_breeze wind moving 8-12 knots; 3 on the Beaufort scale
subtype: moderate_breeze wind moving 13-18 knots; 4 on the Beaufort scale
subtype: fresh_breeze__freshbreeze wind moving 19-24 knots; 5 on the Beaufort scale
subtype: strong_breeze wind moving 25-31 knots; 6 on the Beaufort scale
subtype: chinook_wind__chinookwind__chinook__snoweater a warm dry wind blowing down the E slopes of the Rockies
subtype: harmattan a dusty wind from the Sahara that blows toward the W coast of Africa during the winter
subtype: crosswind wind blowing across the path or a ship or aircraft
subtype: fohn__foehn a warm dry wind that blows down the northern slopes of the Alps
subtype: Santa_Ana.wind__santaana a strong hot dry wind that blows in winter from the deserts of southern California toward the Pacific Coast
subtype: high_wind a very strong wind; "rain and high winds covered the region"
subtype: headwind wind blowing opposite to the path of a ship or aircraft
subtype: tailwind wind blowing in the same direction as the path of a ship or aircraft
subtype: the_doldrums__doldrums a belt of calms and light winds between the northern and southern trade winds of the Atlantic and Pacific
subtype: east_wind__easter__easterly a wind from the east
subtype: levanter an easterly wind in the western Mediterranean area
subtype: northwest_wind__northwestwind__northwester a wind from the northwest
subtype: southwester__sou'wester a strong wind from the southwest
subtype: southeaster__sou'easter a strong wind from the southeast
subtype: gale a strong wind moving 45-90 knots; force 7 to 10 on Beaufort scale
subtype: moderate_gale__near_gale wind moving 32-38 knots; 7 on the Beaufort scale
subtype: fresh_gale__freshgale wind moving 39-46 knots; 8 on the Beaufort scale
subtype: strong_gale wind moving 47-54 knots; 9 on the Beaufort scale
subtype: whole_gale__wholegale wind moving 55-63 knots; 10 on the Beaufort scale
subtype: gust__blast__blow a strong current of air; "the tree was bent almost double by the gust"
subtype: bluster.gust a violent gusty wind
subtype: sandblast a blast of wind laden with sand
subtype: puff_of_air__puff__whiff a short light gust of air
subtype: monsoon a seasonal wind in S Asia; blows from the SW (bringing rain) in summer and from the NE in winter
subtype: monsoon.wind any wind that changes direction with the seasons
subtype: north_wind__northwind__norther__boreas a wind from the north
subtype: bise__bize a dry cold north wind in SE France
subtype: mistral a strong north wind that blows in France during the winter
subtype: tramontane__tramontana a cold dry wind that blows south out of the mountains into Italy and the western Mediterranean
subtype: prevailing_wind the predominant wind direction; "the prevailing wind is from the southwest"
subtype: antitrades wind in the upper atmosphere blowing above but in the opposite direction from the trade winds
subtype: trade_wind__tradewind__trade steady winds blowing from east to west above and below the equator; "they rode the trade winds going west"
subtype: antitrade_wind__antitradewind__antitrade winds blowing from west to east and lying above the trade winds in the tropics
subtype: simoom__simoon__samiel a violent hot sand-laden wind on the deserts of Arabia and North Africa
subtype: south_wind__southwind__souther__southerly a wind from the south
subtype: squall sudden violent winds; often accompanied by precipitation
subtype: line_squall a squall advancing along a front that forms a definite line
subtype: air_current__aircurrent__draft__draught a current of air (usually coming into a room or vehicle)
subtype: thermal rising current of warm air
subtype: updraft an strong upward air current
subtype: downdraft a strong downward air current
subtype: west_wind__wester wind that blows from west to east
subtype: prevailing_westerly__westerly the west-to-east winds that occur in the temperate zones of the Earth
subtype: atmospheric_state__atmosphericstate__atmosphere the weather or climate at some place; "the atmosphere was thick with fog"
subtype: air_mass a large body of air with uniform characteristics horizontally
subtype: high_pressure__high an air mass of higher than normal pressure; "the east coast benefits from a Bermuda high"
subtype: low_pressure__lowpressure__low__depression an air mass of lower pressure; often brings precipitation; "a low moved in over night bringing sleet and snow"
subtype: anticyclone (meteorology) winds spiraling outward from a high-pressure center; circling clockwise in the northern hemisphere and counter-clockwise in the southern
subtype: cyclone.atmospheric_state (meteorology) rapid inward circulation of air masses about a low-pressure center; circling counterclockwise in the northern hemisphere and clockwise in the southern
subtype: fogginess__foggines__murk__murkiness an atmosphere in which visibility is reduced because of a cloud of some substance
subtype: fug (British informal) an airless smoky smelly atmosphere
subtype: good_weather weather suitable for outdoor activities
subtype: calmness.good_weather an absence of strong winds or rain
subtype: stillness__stillnes__windlessnes calmness without winds
subtype: lull__quiet a period of calm weather; "there was a lull in the storm"
subtype: mildness__clemency good weather with comfortable temperatures
subtype: bad_weather__inclemency__inclementness__inclementnes weather unsuitable for outdoor activities
subtype: raw_weather__rawweather unpleasantly cold and damp weather
subtype: storminess the state of being stormy; "he dreaded the storminess of the North Atlantic in winter"
subtype: boisterousness.storminess a turbulent and stormy state of the sea
subtype: windiness__windines__breezines a mildly windy state of the air
subtype: tempestuousness__tempestuousnes a state of wild storminess
subtype: choppiness__roughness__roughnes__roughwater used of the sea
subtype: cloud_cover__cloudcover__cloudiness__overcast the state of the sky when it is covered by clouds
subtype: turbulence instability in the atmosphere
subtype: clear-air_turbulence__clearairturbulence strong turbulence in an otherwise cloudless region that subjects aircraft to violent updrafts or downdrafts
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