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The sun appears red at night because the light it emits must travel a farther distance. Most of the shorter wavelengths have already scattered upon hitting particles in the air, and the only wavelengths left to view are the longer red wavelengths.

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  • How do low-pressure systems form?

    Q: How do low-pressure systems form?

    A: According to About.com, areas of low pressure within the Earth's atmosphere are caused by unequal heating across the surface and the pressure gradient force. Incoming solar radiation largely concentrates at the equator, resulting in warmer air at the lower latitudes. This warm air has a lower barometric pressure than the cooler, denser air near the poles, and the differences between these types of air create the pressure gradient force.
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  • What is the meaning of a red sunset?

    Q: What is the meaning of a red sunset?

    A: The sun appears red at night because the light it emits must travel a farther distance. Most of the shorter wavelengths have already scattered upon hitting particles in the air, and the only wavelengths left to view are the longer red wavelengths.
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  • What is the subpolar low polar front?

    Q: What is the subpolar low polar front?

    A: A subpolar low front is a low pressure system that is small and fleeting. Subpolar lows are typically found over the ocean, near the primary polar fronts at the poles of the northern and southern hemisphere. In the northern hemisphere, the polar front created produces low pressure cyclonic storms in Europe and the Pacific Northwest. In the Southern Hemisphere, it creates severe storms, high winds, and snowfall in Antarctica
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  • What causes the trade winds?

    Q: What causes the trade winds?

    A: The trade winds are caused by a combination of convection air currents and the Earth's rotation. Air is warmed near the Equator and moves towards each pole, respectively. This air is deflected by the Coriolis effect, or the spin of the Earth, causing it to fall back towards the Equator in both hemispheres.
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  • What are the two main factors that determine climate?

    Q: What are the two main factors that determine climate?

    A: The two main factors that determine climate are temperature and the amount of precipitation an area gets. The climate of an area is determined over a long period of time, generally more than a lifetime.
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  • What factors affect weather?

    Q: What factors affect weather?

    A: The amount of sunlight striking an area, the geographic location of an area, the air pressure surrounding an area and the amount of water in the atmosphere all influence the local weather. Each of these components interacts with the other components, and they may exacerbate or moderate each other.
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  • Q: When are upper air winds fastest?

    A: The upper air winds are the fastest in the wintertime when the core wind speeds of the polar front can reach speeds of approximately 250 miles per hour. The polar jet stream travels around the earth at a height of about 5 to 8 miles above the surface.
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  • Q: What are the types of weather maps?

    A: Some types of weather maps are temperature, wind, pressure, radar, jet stream, satellite and front maps. These different weather maps provide information on the prevailing meteorological conditions of a specific location. For example, a temperature map can include the variation in temperatures either on a global scale or confined to a smaller sector, such as a particular city or country.
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  • Q: What does the weather term "haze" mean?

    A: The weather term ���haze��� refers to pollution of salt, dust and fine particles that are dispersed through parts of a specific area���s atmosphere. Individually, these particles are invisible, but when grouped together, they form a haze that diminishes visibility.
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  • Q: How do you interpret a frost map?

    A: To interpret a frost map, look at the map's title to determine whether it shows the first or last frost. Find your location on the map, and identify the color that covers your location. Locate the corresponding color in the map key, and look at the date range to see when the frost happened in your area.
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  • Q: What is the hottest time of the day?

    A: The hottest time of day is usually in the afternoon. The exact time depends upon season and location. There is typically a lag between when the sun is highest in the sky, solar noon, and when the temperature is greatest.
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  • Q: Where did Hurricane Rita hit?

    A: On September 24, 2005, at 2:40 a.m. Central Time, Hurricane Rita made landfall between Johnson Bayou and Sabine Pass in extreme southwestern Louisiana. Rita was a Category 3 storm when it made landfall. It caused over $12 billion in damage and over 100 fatalities.
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  • Q: What is the hottest city in the world?

    A: Death Valley, Calif., is the hottest city in the world, setting a temperature record in 1913 at 134 degrees. The record still stands as of 2014.
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  • Q: Where do you find recreational activities and weather information regarding North Georgia?

    A: Information on recreational activities in northern Georgia are available at specific cities' parks and recreation departments. Dalton and Marietta are among the towns in northern Georgia that include a parks and recreation section on their websites. The National Weather Service website provides weather information for the area.
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  • Q: Where can you find the NOAA winter forecast?

    A: The NOAA winter forecast is available on their website at NOAA.gov. On the site, you can find the complete nontechnical forecast within the current U.S. Winter Outlook.
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  • Q: Who uses prevailing wind pattern maps?

    A: Meteorologists make use of wind maps to make predictions about the weather and to assess the severity of given weather patterns as they move over land or water. These maps chart trends and developments through satellite technology.
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  • What is the weather like in Las Vegas in November?

    Q: What is the weather like in Las Vegas in November?

    A: The average high and low temperatures for Las Vegas in November are 67 degrees F and 43 degrees F. Average rainfall for the month is 0.45 inches.
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  • What are the six elements of weather?

    Q: What are the six elements of weather?

    A: The six basic elements of weather include temperature, humidity, atmospheric pressure, wind, precipitation and cloudiness. When combined, these elements can describe the weather conditions extant.
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  • Q: What is the dry adiabatic rate?

    A: The dry adiabatic rate, or dry adiabatic lapse rate, refers to the rate at which temperature changes as 5.5 degrees Fahrenheit per 1,000 feet. When a parcel of air is lifted, the air temperature decreases as pressure lowers at increasing height.
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  • Where can you find information about how much rain fell in the last 24 hours?

    Q: Where can you find information about how much rain fell in the last 24 hours?

    A: The National Weather Service?s website, Weather.gov, publishes information regarding rainfall totals for the previous 24 hours. For local rainfall totals, enter a city in the search bar, and navigate to the Climate and Past Weather link to find the 24-hour summary.
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  • Q: How do you understand barometer readings?

    A: To understand a barometer's readings, it is necessary either to understand the relationship between air pressure, sea level and weather or to know what certain barometric pressure readings correspond to in terms of anticipated weather. Using the second method, one will only know what weather to anticipate; with the first one, someone is likely to understand the reason for the weather prediction.
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