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| the amount of heat required to raise the temperature of 1 gram of water 1 degrees C or 1.8 F |
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| The process of converting a liquid to a gas. |
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| A general term referring to water vapor in the air but not to liquid droplets of fog, cloud, or rain. |
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| The rate of adiabatic cooling or warming in unsaturated air. The rate of temperature change is 1 C per 100 meters. |
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| The condition of air that has an environmental lapse rate that is less then the wet adiabatic rate. |
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| A fog formed when warm, moist air is blown over a cool surface. |
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| Fog formed when rain evaporates as it falls through a layer of cool air. |
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| The deflective force of Earth's rotation on all free-moving objects including the atmosphere and oceans. Deflection is to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. |
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| A line drawn on a map connecting points of equal atmospheric pressure, usually corrected to sea level. |
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| In the global pattern of prevailing winds, winds that blow from the polar high toward the subpolar low. These winds, however, should not be thought of as persistent winds, such as the trade winds. |
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| The boundary between two adjoining air masses having contrasting characteristics. |
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| An active cold front overtakes a warm front. |
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| A small, very intense cyclonic storm with exceedingly high winds, most often produced along cold fronts in conjunction with severe thunderstorms. |
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| The energy absorbed or released during a change in state. |
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| The change of state from a gas to a liquid |
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| The ratio of the air's water-vapor content to its water-vapor capacity. |
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| The rate of adiabatic temperature change in saturated air. The rate of temperature change is variable, but it is always less that the dry adiabatic rate. |
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Definition
| The condition of air that has an environmental lapse rate that is greater than the dry asiabatic rate ( 1 C per 100 meters). |
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| Force exerted by the weight of the air above. |
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| A low-pressure center characterized by a counterclockwise flow of air in the Northern Hemisphere. |
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| The dominant west-to-east motion of the atmosphere that characterizes the regions on the poleward side of the subtropical highs. |
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| Seasonal reversal of wind direction associated with large continents especially Asia. In winter the wind blows from land to sea; in summer from sea to land. |
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| A front along which a cold air mass thrusts beneath a warmer air mass. |
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| Large low-pressure center with a diameter often exceeding 1000 kilometers that moves from west to east and may last from a few days to more than a week and usually has a cold front and a warm front extending from the central area of low pressure. |
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| A tropical cyclonic storm having winds in excess of 119 kilometers per hour. |
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| The temperature to which air has to be cooled in order to reach saturation. |
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| a form of condensation best described as a dense concentration of suspended water droplets or tiny ice crystals. |
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| The condition of moist air with an environmental lapse rate between the dry and wet adiabatic rate. |
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| fGoh having the appearance of steam;produced by evaporation from a warm-water surface into the cool air above. |
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| Air flowing horizontally with respect to Earth's surface. |
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| a high-pressure center characterized by a clockwise flow of air in the Northern Hemisphere. |
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| Two belts of winds that blow almost constantly from easterly directions and are located on the equator-ward sides of the subtropical highs. |
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| A large body of air that is characterized by a sameness of temperature and humidity. |
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| A front along which a warm air mass overrides a retreating mass of cooler air. |
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| a storm produced by a cumulonimbus cloud and always accompanied by lightning and thunder, It is of relatively short duration and usually accompanied by strong wind gusts, heavy rain, and sometimes hail. |
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| The conversion of a solid directly to a gas without passing through the liquid state |
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