Weather Glossary



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Ablation Depletion of snow and ice by melting and evaporation. ...
Absorption The process in which incident radiant energy is retained by a substance by conversion to ...
Accretion The growth of a precipitation particle by the collision of a frozen particle with a ...
Adiabat A line on a thermodynamic chart relating the pressure and temperature of a substance (such ...
Adiabatic Changes in temperature caused by the expansion (cooling) or compression (warming) of a body of ...
Adiabatic Lapse Rate The rate of decrease of temperature experienced by a parcel of air when it is ...
Advection Transport of an atmospheric property by the wind. ...
Air Mass A body of air covering a relatively wide area and exhibiting horizontally uniform properties. ...
Air Mass Thunderstorm Generally, a thunderstorm not associated with a front or other type of synoptic-scale forcing mechanism. ...
Albedo Reflectivity; the fraction of radiation striking a surface that is reflected by that surface. ...
Alberta Clipper A fast moving low pressure system that moves southeast out of Canadian Province of Alberta ...
Aleutian Low A semi-permanent, subpolar area of low pressure located in the Gulf of Alaska near the ...
Altostratus A cloud of a class characterized by a generally uniform gray sheet or layer, lighter ...
Anemometer An instrument used for measuring the speed of the wind. ...
ANOMALOUS PROPAGATION Non-standard atmospheric temperature or moisture gradients will cause all or part of the radar beam ...
Anticyclone A large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in ...
Anvil The flat, spreading top of a cumulonimbus cloud, often shaped like an anvil. Thunderstorm anvils ...
Arctic Oscillation The Arctic Oscillation is a pattern in which atmospheric pressure at polar and middle latitudes ...
Arcus A low, horizontal cloud formation associated with the leading edge of thunderstorm outflow (i.e., the ...
Azores High Alternate term for Bermuda High - a semi-permanent, subtropical area of high pressure in the ...
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City Weather

Toronto
Cloudy 12°C
Halifax
Fog 11°C
Quebec
Mist and Fog 3°C
Ottawa
Mostly Cloudy 16°C
Montreal
Cloudy 10°C
Winnipeg
Mostly Clear -2°C
Calgary
Cloudy 1°C
Yellowknife
Mostly Cloudy -4°C
Saskatoon
Cloudy 6°C
Vancouver
Partly Cloudy 9°C

Last Update: 3:00 AM Apr 28 2017

Weather can be active anytime when you make your visit to Canada. With each season offering its own unique conditions to observe. Booking coach or business class flights it is always a great time to visit Canada and its vast display of weather.