Types of Weather

by Kirstinszogas
Last updated 8 years ago

Discipline:
Science
Subject:
Earth Sciences
Grade:
12

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Types of Weather

Fog is caused by

Fog is caused by air being cooled to the point where it can no longer hold all of the water vapor it contains. This causes condensed water droplets to form. Fog is the most common in the fall. This is because when the nights get longer and air masses cool, the difference between the air termerpature and the land/water masses that have been heated all summer is greater. http://upload.wikimedia.org/wikipedia/commons/c/ca/Dense_Seattle_Fog.jpghttp://www.weatherquestions.com/What_causes_fog.htmhttp://www.weatherquestions.com/What_causes_fog.htm

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Tornadoes are the result of a very large thunderstorm called a supercell. Durng the storm, cold air and warm are are forced together which causes the cold air to drop and the warm air to rise. The warm air eventually twists into a spiral and forms a funnel cloud. The sky gets very dark as the tornado touches down and begins it's path of destruction.http://www.universetoday.com/71983/how-are-tornadoes-formed/http://www.pbcgov.com/dem/_images/tornado_1.jpg

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Hurricanes form over warm waters in the parts of the Atlantic and Pacific Oceans nearest to the equator. Before they become very powerful they are refered to as tropical storms. As moisture from the ocean evaporates it rises until enormous amounts of heated moist air collect and begin to swirl. In the northern hemisphere, the winds spin counter- clockwise, and in the southern hemisphere they spin clockwise. To be classfied as a hurricane, the winds must move at a speed higher than 74 miles per hour. http://www.cotf.edu/ete/modules/sevweath/swhoware.htmlhttp://geology.com/hurricanes/named-hurricane-fran.gif

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Clouds are formed when water evaporates from the ocean or other water sources. As it rises up in the atmosphere it condenses and clings to other particles such as dust and sea spray. This collects the water droplets into a mass where they remain untll they are large enough to fall. http://www.universetoday.com/46489/how-are-clouds-formed/#ixzz2ZwLoAvfahttp://blog.napc.com/Portals/10319/images/clouds.jpg

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Snow is formed the same way that rain is in the begining. Water evaoprates and condenses into clouds, but then when cold air is added snow is formed. When the air is cold, the water vapor freezes and becomes an ice crystal. As more and more water vapor collects and freezes, the ice crystal gets heavier and heavier. When it gets too heavy, it falls like rain. http://www.learner.org/interactives/weather/iceandsnow.htmlhttp://upload.wikimedia.org/wikipedia/commons/1/13/Nature_landscape_snowing_mountains_village_Austria_(8279714859).jpg

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Thunderstorms are formed when the sun heats the surface of the Earth. The surface then heats the air just above the surface creating a warm air mass. The action of warm air rising and cold air sinking (convection) is what causes thunderstorms. The rising warm air transfers heat from the land surface to upper levels of the atmosphere through the process of convection.http://www.eo.ucar.edu/kids/dangerwx/tstorm4.htmhttp://racineuncovered.org/wp-content/uploads/2012/03/thunderstorm.jpg

Dust Storms are formed when very very large fronts sweep across hot, dry surfaces. When cold fronts undercut warm air, the pressure gradient increases, and the winds shift and get stronger. The, the shifting winds and the high surface temperature creates convective currents at the leading edge of the storm. This lifts the particles higher and keeps them up longer, continuing the storm.http://science.howstuffworks.com/nature/climate-weather/storms/dust-storm3.htmhttp://cdn.theatlanticwire.com/img/upload/2011/07/06/Dust-storm-Texas-1935.png

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Hail is initially formed similarly to how rain and snow are formed. Water evaporates and then condendeses to form clouds. However, as the rain begins to fall, it is lifted up by currents and supercooled by the air (when the air is below freezing) which turns them into balls of ice.The faster the updraft on these balls of ice, the bigger they can grow.http://atmo.tamu.edu/weather-and-climate/weather-whys/673-hail-formationhttp://upload.wikimedia.org/wikipedia/commons/c/cc/Hail_RichmondHill.jpg

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Wildfires can form when fuel, oxygen, and a heat source are present. Fuel can be any flammable material around. This includes trees, grasses, brush, and sometimes homes. The fire gets its needed oxygen from the air arround it. Finally, it needs a heat source. Heat sources, such as lightning, campfires or then sun help spark the wildfire and bring fuel to temperatures hot enough to ignite. 4/5 wildfires are caused by humans, from irresponsible flames and cigarettes.http://www.wildlandfire.com/pics/wall/wildfire_biscuit.jpghttp://environment.nationalgeographic.com/environment/natural-disasters/wildfires/

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A blizzard can form when there is both cold and warm air, and moisture. The cold air is needed to make snow, the warm air is needed to rise over the cold air and create a front. The mositure means that the air can hold a lot of moisture, which is a necarary part of any large forms. Blizzards are essentially large stowstorms with much more powerful winds.http://www.eo.ucar.edu/kids/dangerwx/blizzard3.htmhttp://severe-wx.pbworks.com/f/1228362113/blizzardretouched.jpg

TYPES OF WEATHER!

THE END :)


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