What is the difference between cold wave and hot wave?
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Cold wave
A cold wave (known in some regions as a cold snap or cold spell) is a weather phenomenon that is distinguished by a cooling of the air. Specifically, as used by the U.S. 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. The precise criterion for a cold wave is determined by the rate at which the temperature falls, and the minimum to which it falls. This minimum temperature is dependent on the geographical region and time of year.[1]
In the United States, a cold spell is defined as the national average high temperature dropping below 20 °F (−7 °C).[2] A cold wave of sufficient magnitude and duration may be classified as a cold air outbreak (CAO).[3]
Hot wave
A heat wave is a period of excessively hot weather, which may be accompanied by high humidity, especially in oceanic climatecountries. While definitions vary,[1] a heat wave is measured relative to the usual weather in the area and relative to normal temperatures for the season. Temperatures that people from a hotter climate consider normal can be termed a heat wave in a cooler area if they are outside the normal climatepattern for that area.[2]
The term is applied both to hot weather variations and to extraordinary spells of hot which may occur only once a century. Severe heat waves have caused catastrophic crop failures, thousands of deaths from hyperthermia, and widespread power outages due to increased use of air conditioning. A heat wave is considered extreme weather, and a danger because heat and sunlight may overheat the human body. Heat waves can usually be detected using forecastinginstruments so that a warning call can be issued.
A cold wave (known in some regions as a cold snap or cold spell) is a weather phenomenon that is distinguished by a cooling of the air. Specifically, as used by the U.S. 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. The precise criterion for a cold wave is determined by the rate at which the temperature falls, and the minimum to which it falls. This minimum temperature is dependent on the geographical region and time of year.[1]
In the United States, a cold spell is defined as the national average high temperature dropping below 20 °F (−7 °C).[2] A cold wave of sufficient magnitude and duration may be classified as a cold air outbreak (CAO).[3]
Hot wave
A heat wave is a period of excessively hot weather, which may be accompanied by high humidity, especially in oceanic climatecountries. While definitions vary,[1] a heat wave is measured relative to the usual weather in the area and relative to normal temperatures for the season. Temperatures that people from a hotter climate consider normal can be termed a heat wave in a cooler area if they are outside the normal climatepattern for that area.[2]
The term is applied both to hot weather variations and to extraordinary spells of hot which may occur only once a century. Severe heat waves have caused catastrophic crop failures, thousands of deaths from hyperthermia, and widespread power outages due to increased use of air conditioning. A heat wave is considered extreme weather, and a danger because heat and sunlight may overheat the human body. Heat waves can usually be detected using forecastinginstruments so that a warning call can be issued.
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A cold wave identified in several areas as a cold snap is a climate phenomenon that is characterized by a cooling of the atmosphere. Particularly, as adopted by the U.S. National Weather Service, a cold wave is a speedy fall in heat in a 24-hour period claiming considerably enhanced security to farming, business, trade, and social activities.
A heat wave is a stage of an extremely hot climate, which may be appended by great humidity, particularly in oceanic environment nations. While interpretations vary, a heat wave is ordinarily determined relevant to the normal weather in the region and corresponding to normal temperatures for the summer.
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