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severe weather

Madison Angelico

on 8 January 2013

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Transcript of Weather

Severe Weather Hurricanes Tornadoes A hurricane is a very powerful storm that sweeps in from the ocean. Dust storms are very strong winds that lift huge quantities of dust , often to great heights, then the wind drops it down again. The wind are created at fronts where warm air rises quickly. A monsoon is a wind circulation pattern that changes direction with the season. The cycle involves the atmosphere and the ocean. There are two types of monsoons. In the summer, warm air over the land rises and creates lower pressure. Monsoons, or rainy seasons, are a shift in wind direction which causes heavy rainfall. In the summer, the winds blow from the water to the land, bringing heavy rainfall. Monsoons are very popular around tropical regions, such as India, Bangladesh, and Pakistan. They move
inward spiraling
from an area of high
pressure to an area
of low pressure. Dust storms There swirling
winds move up
to 150 miles
per hour. Tornadoes are very fast funnel-shaped winds in low pressure
Tornadoes can be very thin or they can be over a mile across When a hurricane hits the wind can move
up to 30 feet or more in height. The USA is the most tornado hit country with over 1000 tornadoes a year Tornado alley is in Texas, Oklahoma, Kansas, Nebraska, Iowa, Missouri, Arkansas, and Florida. Tornado alley is where most tornadoes hit they appear in dry areas where loose dirt can be easily picked up. Tornadoes have speeds of up to about 300 mph The Fujita Scale is a way for measuring tornadoes the speeds of dust storms are at least 25 mph. Summer Monsoons the storm rises over 10,000 feet and spread many miles long. Typhoons Typhoons are powerful storms that form in the Pacific ocean. These storms are similar to hurricanes, but not completely. For instance, typhoons are twice as frequent as their Atlantic counterparts, as they have more sea to form over. Also, they are usually stronger and larger due to the Pacific's warmer weather, which creates better conditions for the development of a typhoon. However, besides these Hurricanes Hurricanes are the planets most destructive storms. There are five
category's that hurricanes are divided into there is a Hurricane type 1, 2, 3, 4, and 5 A category 5
Hurricane is
the worst
kind of storm dust storms Most dust storms appear in the desserts where dirt can easily be picked up by strong winds. If rain accrues during a dust storm the dust storm is usually short, this is because the rain washes the dust out of the atmosphere. Category 1 travels at the speed of 74-95 mph.
Category 2 travels at the speed of 96-110 mph.
Category 3 travels at the speed of 111-129 mph.
Category 4 travels at the speed of 130-156 mph.
Category 5 travels at the speed of 157 mph. or higher When the storm is over the dust particles get carried up into the atmosphere. differences, they also have similarities. Since both are basically the same storm structure, they are both classified with the Saffir-Simpson Hurricane Wind Winter Monsoons Scale. Also, they share the same characteristics, like rain and winds. Typhoon
Fun Facts Dust storms carry fine particles like salt, clay, dust and other materials for long distances. the particles swirl around in violent winds creating a dust storm. * Typhoons can range from a radius of less than 222 km (138 mi) to larger than 888 km (552 mi).
* Most typhoons strike the Philippines
* On average, about 6 typhoons form in August
* The word "typhoon" comes from the Chinese word for it, "tai feng". As mentioned before, there are two types of monsoons. The winter monsoon is basically the opposite of a summer monsoon. In the winter, the cold air over the land creates higher pressure. Monsoons, or rainy seasons, are a shift in wind direction which causes heavy rainfall. In winter, the wind blows from the land to the ocean, so heavy rainfall is over the ocean. Typhoon Video
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