A tribute...
Well,frankly speaking,things like the haze problem and forest burning had brought back my desire to study those subject tht i wanted to study long time ago(Envi.Scn.,Biopsy.)...but definitely no nore Biochemistry(sick of it!)....Actually when i was in Inti College i'm doing a project on the topic Tornadoes but (sorry to my teammate!) i went off without informing y'all to Sunway...and suddenly our group left 2 person(Lohen and Yi Cheng)...hope y'all r fine with ur ENL101 presentation...although we'd already make it halfway through...really sorry...when i think of Tornadoes and Environmental's issue i'll think of all of u in Inti...haha
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Brief's on Tornadoes...pls be noted that tornado is different from hurricane,typhoon,tropical cyclone and
Jet Stream
Tornadoes are one of nature's most violent storms. In an average year, about 1,000 tornadoes are reported across the United States, resulting in 80 deaths and over 1,500 injuries. A tornado is a violently rotating column of air extending from a thunderstorm to the ground. The most violent tornadoes are capable of tremendous destruction with wind speeds of 250 mph or more. Damage paths can be in excess of one mile wide and 50 miles long. Tornadoes come in all shapes and sizes and can occur anywhere in the U.S. at any time of the year. In the southern states, peak tornado season is March through May, while peak months in the northern states are during the summer.
Ok,well,the measure of Tornadoes are based on their damages to the earth surface but not their wind speed as their wind speed has not ever been measured scientifically but just hypothetically(Mathematical studies) on Fujita Scale.Therefore literally F-scale should not be taken...but still some place are still using this scale as it may not represent real tornadoes!
Many tornadoes, including the strongest ones, develop from a special type of thunderstorm known as a supercell. A supercell is a long-lived, rotating thunderstorm 10 to 16 km (6 to 10 mi) in diameter that may last several hours, travel hundreds of miles, and produce several tornadoes. Supercell tornadoes are often produced in sequence, so that what appears to be a very long damage path from one tornado may actually be the result of a new tornado that forms in the area where the previous tornado died. Sometimes, tornado outbreaks occur, and swarms of supercell storms may occur. Each supercell may spawn a tornado or a sequence of tornadoes.
Scientists do not understand exactly how tornadoes form, but there are many theories. Here is one theory......During the spring time cool air rushes down from Canada. This cool air meets the hot, dry air coming up from Mexico. The two winds meet in an area known as Tornado Alley(where the winds trap here cos due to the humidity of USA innerland). Tornado alley is the area around Texas, Oklahoma, Iowa, and Kansas. The warm air pushes below the cool air. That’s when thunderstorms occur. The warm air weighs less than the cool air so it begins to rise in thermal currents. These currents of hot air spin upward counter-clockwise, explaining why most tornadoes spin counterclockwise. Almost 1 out of a thousand tornadoes spins clockwise. The warm currents rise high into the atmosphere were it begins to cool. That is when the low pressure air sinks through the spinning thermal. The thermal current implodes and the spinning motion speeds up rapidly. These winds can reach up to 300 miles per hour, but are often much slower. The tornado shoots down to the ground, sucking up everything it touches high into the air.
Do you know that?
147 tornadoes touched down in 13 U.S. states on 3 and 4 April, 1974. with F-scale damage .One more tornado touched down in Canada at Windsor ON, then lifted as it entered MI, for a total of 148. Since it did no damage in the U.S., it is not counted in the U.S. tornado database . The outbreak killed 310 in the U.S., 8 in Canada, with 5454 U.S. injuries and 23 hurt in Canada. 48 of the tornadoes were killers. Seven produced damage rated F5 -- the maximum possible -- and 23 more were rated F4. This was one of only two outbreaks with over 100 confirmed tornadoes, the other being with Hurricane Beulah in 1967 (115 tornadoes). Scary and Horrible right?How can u imagine that?
The deadliest tornadoes outbreak on earth is the well known 'Tri State' tornado that happened in USA in 1925 killing 695 ppls across Missouri,Illinois and Indiana.
And there's many ppl in USA tht ethusiated to the Tornado they are known as 'Storm Chaser' or 'Tornado Chaser'.
Some of the storm chaser website:
http://www.tornadochaser.net/tornado.html
http://www.cimms.ou.edu/~stumpf/chase.html
NOAA(National Oceonographic and Atmospheric Administration)...USA
http://www.noaa.gov/
PS: Most of the source are came from USA as you can see around 90% of Tornadoes occured in
USA per year on the Earth...
As for Malaysia meteorological department pls check out here for latest update on the Haze,Tsunami and many other natural disaster tht could happen in Malaysia anytime...
http://www.kjc.gov.my/
*Please read the precaution steps and safety(surviving) tips provided,it might be useful
sometimes as most Malaysia don't bother much about these bcos we are living in a disasters-
free country...but do think of the haze problem,forest burning,tsunami and Earth quake(in
neighbouring country),although most of the time we are safe but look at the earthquake tht
happened in Indonesia tht can also affect our country and think about it..."afterall we are not
tht safe anyway..."the world is changing now due to industrialization and many human
activities...Cherish the earth as we only have one!
