We have talked quite a bit about tornadoes this year. With all of the destruction that occurred down south a few weeks ago lets take a look at what a tornado actually is. Check out the following link.
Tornado
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What is a tornado? How do tornadoes form? How do tornadoes stop? What is a supercell thunderstorm? What is a mesocyclone? What is a wall cloud? What are the levels on the fujita tornado scale of intensity? What happens at the different levels?
5 comments:
A tornado is a violent rotating column of air extending from a thunderstorm to the ground.
You need warm, moist air from the Gulf of Mexico and cool, dry air from Canada.
Scientist still dont full understand how tornados die.
A supercell thunderstorm is a long-lived thunderstorm whose updrafts and downdrafts are in near balance.
A mesocyclone is a rotating vortex of air within a supercell thunderstorm.
A wall cloud is an abrupt lowering of a rain-free cumulonimbus base into a low-hanging accessory cloud.
For the levels they use wind speed.
It explains how much damage occurs.
A tornado is a violent rotating column of air extending from a thunderstorm to the ground.Most tornadoes form from thunderstorms. When these two air masses meet, they create instability in the atmosphere. A supercell thunderstorm is a long-lived thunderstorm whose updrafts and downdrafts are in near balance. A mesocyclone is a rotating vortex of air within a supercell thunderstorm. Mesocyclones do not always produce tornadoes.
A wall cloud is an abrupt lowering of a rain-free cumulonimbus base into a low-hanging accessory cloud. For each level it decribes the difrerent intensity of a storm that can happen.
Tornado: a small rotating column of air that has high wind speeds of at least 119 km/h.
For Tornadoes to form, the Earth's surface must be warm and moist, and the atmosphere must be unstable (this happens when warm, moist air from the Gulf of Mexico and cool, dry air from Canada meet,they make the atmosphere instable)
No one really knows how tornadoes stop yet.
A supercell is a long-lived thunderstorm whose updrafts and downdrafts are kinda balanced.
A mesoclyclone is a rotating vortex of air in a supercell thunderstorm.
The levels on the fujita tornado scale of intesity are; F1, F2, F3, F4,and F5.
F0 40-72 mph Light damage: Branches broken off trees; minor roof damage EFO
65-85 mph
F1 73-112 mph Moderate damage: Trees snapped; mobile home pushed off foundations; roofs damaged EF1
86-110 mph
F2 113-157 mph Considerable damage: Mobile homes demolished; trees uprooted; strong built homes unroofed EF2
111-135 mph
F3 158-206 mph Severe damage: Trains overturned; cars lifted off the ground; strong built homes have outside walls blown away EF3
136-165 mph
F4 207-260 mph Devastating damage: Houses leveled leaving piles of debris; cars thrown 300 yards or more in the air EF4
166-200 mph
F5 261-318 mph Incredible damage: Strongly built homes completely blown away; automobile-sized missiles generated EF5
over 200 mph
they still arnet sure how tornados stop, but every piece of evidence, helps answer another question
tornadeos are dangeriss. tornados form by rain and lighting and thunder and floods and hurracanes and sunomes.
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