ASL STEM

Trough Sign Video

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Definition

An elongated area of low atmospheric pressure.

Source: Essentials of Meteorology: An Invitation to the Atmosphere (fifth edition) by C. Donald Ahrens

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> Trough

+ Mid Holocene Maximum *

+ Middle Latitudes *

+ Dew Cell *

+ Absolute Humidity *

+ Back Door Cold Front *

+ Absolutely Stable Atmosphere *

+ Absolutely Unstable Atmosphere *

+ Accretion *

+ Acid Deposition *

+ Clear Ice *

+ Adiabatic Process *

+ Advection *

+ Advection Fog *

+ Aerosols *

+ Aerovane (Skyvane) *

+ Aggregation *

+ Air Mass *

+ Apparent Temperature *

+ Arctic Front *

+ Arctic Oscillation *

+ Air Pressure *

+ Air Quality Index (Aqi) *

+ Analogue Forecasting Method *

+ Anemometer *

+ Aneroid Barometer *

+ Anticyclone *

+ Atmospheric Boundary Layer *

+ Atmospheric Stagnation *

+ Atmospheric Window *

+ Bimetallic Thermometer *

+ Chinook Wall Cloud *

+ Chinook Wind *

+ Clear Air Turbulence *

+ Chlorofluorocarbons *

+ Centripetal Acceleration *

+ Centripetal Force *

+ Blackbody *

+ Billow Clouds *

+ Buys Ballot's Law *

+ California Current *

+ Carbon Monoxide *

+ Condensation Level *

+ Cirrocumulus *

+ Cirrostratus *

+ Climatic Controls *

+ Global Scale *

+ Climatological Forecast *

+ Collision Coalescence Process *

+ Comma Cloud *

+ Condensation Nuclei *

+ Conditionally Unstable *

+ Contact Freezing *

+ Continental Arctic Air Mass *

+ Continental Polar Air Mass *

+ Continental Tropical Air Mass *

+ Dissipating Stage *

+ Dry Adiabatic Rate *

+ Dry Bulb Temperature *

+ Dry Lightning *

+ Dry Line *

+ Dust Devil (Whirlwind) *

+ Easterly Wave *

+ Eddy *

+ Ensemble Forecasting *

+ Long Range Forecast *

+ Entrainment *

+ Environmental Lapse Rate *

+ Evaporation Fog *

+ Exosphere *

+ Extratropical Cyclone *

+ Forced Convection *

+ Freezing Rain Or Drizzle *

+ Glaciated Cloud *

+ Frozen Dew *

+ Fujita Scale *

+ Frost (Hoarfrost) *

+ Frost Point *

+ Funnel Cloud *

+ Geostationary Satellite *

+ Geostrophic Wind *

+ Friction Layer *

+ Front *

+ Frontal Thunderstorm *

+ Growing Degree Day *

+ Longwave Radiation *

+ Heating Degree Day *

+ High Inversion Fog *

+ Homosphere *

+ Hook Echo *

+ Horse Latitudes *

+ Humid Continental Climate *

+ Humidity *

+ Humid Subtropical Climate *

+ Hurricane *

+ Hydrostatic Equation *

+ Snow Flurries *

+ Hydrostatic Equilibrium *

+ Infrared Radiometer *

+ Insolation *

+ Instrument Shelter *

+ Interglacial Period *

+ Intertropical Convergence Zone *

+ Katabatic (Fall) Wind *

+ Kirchoff's Law *

+ Knot *

+ Koppen Classification System *

+ Longwaves In The Westerlies *

+ Low Level Jet Streams *

+ Maritime Polar Air Mass *

+ Maritime Tropical Air Mass *

+ Mature Thunderstorm *

+ Maunder Minimum *

+ Medium Range Forecast *

+ Mercury Barometer *

+ Mesoscale Convective Complex *

+ Mesoscale Convective System *

+ Milankovitch Theory *

+ Moist Adiabatic Rate *

+ Monsoon Wind System *

+ Mountain And Valley Breeze *

+ Multicell Storms *

+ Tropopause *

+ Nacreous Clouds *

+ Neutral Stability *

+ Nitric Oxide (No) *

+ Nitrogen Dioxide *

+ Nitrogen Oxides *

+ Noctilucent Clouds *

+ Nonsupercell Tornado *

+ North Atlantic Oscillation *

+ Northeaster *

+ Nowcasting *

+ Nuclear Winter *

+ Numerical Weather Prediction *

+ Obliquity *

+ Occluded Front (Occlusion) *

+ Ordinary Thunderstorm *

+ Orographic Uplift *

+ Outgassing *

+ Outflow Boundary *

+ Overrunning *

+ Pacific Decadal Oscillation *

+ Parcel Of Air *

+ Particulate Matter *

+ Pattern Recognition *

+ Permafrost *

+ Persistence Forecast *

+ Photodissociation *

+ Pileus Cloud *

+ Planetary Scale *

+ Pleistocene Epoch (Ice Age) *

+ Polar Easterlies *

+ Polar Front *

+ Polar Jet *

+ Polar Front Theory *

+ Polar Ice Cap Climate *

+ Polar Low *

+ Polar Orbiting Satellite *

+ Polar Tundra Climate *

+ Pollutants *

+ Precession *

+ Precipitation *

+ Pressure Gradient *

+ Pressure Gradient Force *

+ Pressure Tendency *

+ Prevailing Westerlies *

+ Prevailing Wind *

+ Primary Air Pollutants *

+ Probability Forecast *

+ Prognostic Chart *

+ Psychrometer *

+ Radiational Cooling *

+ Radiation Fog *

+ Radiation Inversion *

+ Radiative Equilibrium Temp *

+ Radiative Forcing *

+ Radiative Forcing Agent *

+ Rawinsonde Observation *

+ Relative Humidity *

+ Saffir Simpson Scale *

+ St Elmo's Fire *

+ Santa Ana Wind *

+ Sheet Lightning *

+ Saturation Vapor Pressure *

+ Sea Level Pressure *

+ Secondary Air Pollutants *

+ Selective Absorbers *

+ Semi Arid Climate *

+ Semipermanent Highs And Lows *

+ Sensible Heat *

+ Sensible Temperature *

+ Severe Thunderstorms *

+ Shelf Cloud *

+ Short Range Forecast *

+ Shortwave (In The Atmosphere) *

+ Shortwave Radiation *

+ Snow Albedo Feedback *

+ Southern Oscillation *

+ Specific Humidity *

+ Spin Up Vortices *

+ Squall Line *

+ Subpolar Climate *

+ Standard Atmosphere *

+ Standard Atmospheric Pressure *

+ Standard Rain Guage *

+ Stationary Front *

+ Statistical Forecast *

+ Steady State Forecast *

+ Stefan Boltzmann Law *

+ Subsidence Inversion *

+ Subtropical High *

+ Subtropical Jet Stream *

+ Supercell Tornadoes *

+ Supercooled Cloud *

+ Supersaturation *

+ Super Typhoon *

+ Synoptic Scale *

+ Taiga (Boreal Forest) *

+ Teleconnections *

+ Thermal Belts *

+ Thermal Circulation *

+ Thermal Lows\Highs *

+ Tornado Vortex Signature *

+ Trade Wind Inversion *

+ Tropical Cyclone *

+ Tropical Depression *

+ Tropical Disturbance *

+ Tropical Easterly Jet *

+ Tropical Monsoon Climate *

+ Tropical Rain Forest *

+ Tropical Storm *

+ Tropical Wave *

+ Tropical Wet Climate *

- Trough *

+ Upslope Precipitation *

+ Urban Heat Island *

+ Vapor Pressure *

+ Vernal Equinox *

+ Very Short Range Forecast *

+ Virga *

+ Visbility *

+ Weather Watch *

+ Volatile Organic Compounds *

+ Weather Type Forecasting *

+ Weather Types *

+ Weather Warning *

+ Westerlies *

+ Wet Bulb Depression *

+ Wet Bulb Temperature *

+ Hurricane Warning *

+ Hurricane Watch *

+ Wind Profiler *

+ Wind Rose *

+ Younger Dryas Event *

+ Advection Radiation Fog

+ Stratospheric Polar Night Jet *

+ Ice Crystal (Bergeron) Process *

+ Summer Solstice *

+ Dew Point *

+ Wind Chill Index *

* video needed

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