Where do most tornadoes hit in the United States?In the United States, the area where the tornadoeshit the most is called Tornado Alley. The states which are in the tornado alley are:TexasNebraskaColoradoIowaIllinoisIndianaMissouriArkansasDanger!Tornadoes!
What is a hurricane?Violent cyclonic storm that develops in the tropical regionWind speeds are > 74 mph
Rotation and PressureIn which direction does a hurricane rotate?COUNTERCLOCKWISE
Is the barometric pressure inside the hurricane high or low?LOW
What conditions must be present for a hurricane to develop?1. Warm ocean temperatures (>80 F) up to 60m deep2. Little to no wind shear3. Low pressure system at least 5 North or South of Equator4. Rotation caused by winds
By what two factors is hurricane strength measured?
What is the Scale Used to Categorize Hurricanes?Saffir-Simpson ScaleSource: http://kids.earth.nasa.gov/archive/hurricane/saffir-simpson.html
Thunderstorms and Rising AirThunder storms are started when air rises, cools and starts to loose its moisture.T-storms are caused by rising humid air along either a warm or cold frontThe greater the temperature differences, the more quickly the storm formsT-storms are rather short-lived, usually the cycle lasts an hour or less
3 parts to a T-stormFormation rising air expands & cools; condensation occurs, clouds formMature precipitation/bad weatherDissipation clouds disappear
1. A severe snowstorm with strong winds and poor visibility2. Winds must exceed 56km (35 mi) per hour3. Temperature must be -7 degrees celsius or lower
When do Blizzards OccurBlizzards occur anytime between late fall and early spring.
How do Blizzards Form1. When colder air meets warmer air and begin to twist. 2. Some type of precipitation must be present in the clouds.3. Must be a combination of freezing temperature and heavy winds.
Where Do Blizzards OccurBlizzards are most common in the:
Northern Mississippi BasinCentral Part of CanadaRussia 4. Central Great Plains
That brings us to what a tornado is. A tornado is a violently rotating column of air extending from a thunderstorm to the ground. That column of air is what gives the tornado its nicknames.There are some things that are necessary in order for a tornado to form. A change in wind direction is necessary in order to have a tornado. As you probably realize, a tornado needs a high degree of wind speed. Tornadoes need increasing height. They do not just stay at a base level.Lastly, when you have a thunderstorm, air begins to rise which helps form a tornado.Here is the Fujita Scale. It has the category of the tornado ranging from F0 to F5. The category of each tornado depends on its wind speed. It has the damage which each type of tornado causes. Looking at all the tornadoes that occur in the United States, there is a particular region in which the majority of the tornadoes occur. This area is called tornado alley. The states which are in tornado alley are Texas, Nebraska, Colorado, Iowa, Illinois, Indiana, Missouri, and Arkansas.