Weather And How It Effects Us
By: Giovanni LARIN
Tornados happen when hot air and cold air meet .Tornadoes are usually the extreme result of a very large thunderstorm called a supercell.The cold air goes drops as the warm air rises. The warm air eventually twists into a spiral and forms a funnel cloud. The sky turns a very dark green color and the tornado begins its destruction. Tornados can be really big.some have been two miles wide.Most tornadoes form from thunderstorms. You need warm, moist air from the Gulf of Mexico and cool, dry air from Canada. When these two air masses meet, they create instability in the atmosphere. A change in wind direction and an increase in wind speed with increasing height creates an invisible, horizontal spinning effect in the lower atmosphere. Rising air within the updraft tilts the rotating air from horizontal to vertical. An area of rotation, 2-6 miles wide, now extends through much of the storm. Most strong and violent tornadoes form within this area of strong rotation.http://www.weatherwizkids.com/weather-tornado.htm most of it was from this website
Other names for a hurricane include cyclone, typhoon and tropical storm.
While they are essentially the same thing, the different names usually indicate where the storm took place. Tropical storms that form in the Atlantic or Northeast Pacific (near the United States) are called hurricanes, those that form near in the Northwest Pacific (near Japan) are called typhoons and those that form in the South Pacific or Indian oceans are called cyclones.
Hurricanes usually form in tropical areas of the world.
Hurricanes develop over warm water and use it as an energy source.
Hurricanes lose strength as they move over land.
Coastal regions are most at danger from hurricanes.
As well as violent winds and heavy rain, hurricanes can also create tornadoes, high waves and widespread flooding.
Hurricanes are regions of low atmospheric pressure (also known as a depression).
The wind flow of hurricanes in the southern hemisphere is clockwise while the wind flow of hurricanes in the northern hemisphere is counterclockwise.
Weather in the eye of a hurricane is usually calm.
The eye of a hurricane can be anywhere from 2 miles (3.2 kilometres) in diameter to over 200 miles (320 kilometres) but they are usually around 30 miles (48 kilometres).
The winds around the eye of a hurricane are usually the strongest.
Hurricanes can be tracked by weather satellites and weather radar closer to land.
Hurricanes have led to the death of around 2 million people over the last 200 years.
The 1970 Bhola Cyclone that struck Bangladesh killed over 300000 people.
In 2005 Hurricane Katrina killed over 1800 people in the United States and caused around $80 billion dollars worth of property damage. The city of New Orleans was hit particularly hard with levee breaches leading to around 80% of the city being flooded.http://www.sciencekids.co.nz/sciencefacts/weather/hurricane.html