A tornado in which more than two whirlpools revolve around the same center. Multi-vortex structures often appear in violent tornadoes, and these small vortices often cause greater damage in the area where the main tornado passes.
Second, Lu Longjuan
Landspout and the National Weather Service called dust tube tornado a term to describe tornadoes unrelated to mesoscale cyclones. Tornadoes and waterspouts have some similar characteristics, such as relatively weak intensity and short duration, and funnel-shaped clouds formed by condensation often do not touch the ground. Although the intensity is relatively weak, tornadoes will still bring strong winds and serious damage.
Third, waterspouts.
It can be simply defined as "water tornado", which usually refers to a non-supercell water tornado. The hose will overturn the ship and destroy it. When it lands, it will do more harm and take away life.
Dragon sucks water is another name for tornado, because it is very similar to the East China Sea Dragon in ancient mythology, and there are many other names, such as "dragon sucks water", "dragon wags its tail" and "inverted dragon".
Tornadoes are water-absorbing dragons, which are common tornadoes on land. Tornadoes are the flow of air, and air is invisible. The air pressure in the center of the tornado is very attractive. Attract dust, water vapor and other sundries. Due to gravity, liquid water cannot stay in the air for a long time. After the dragon absorbs water, the water sucked into the sky will fall and form a rainstorm, so the so-called dragon suction is a tornado.
Dragon water absorption is a tornado that occasionally appears over warm water.
Its upper end is connected with thunderstorm clouds, and its lower end extends directly to the water surface, and the air rotates rapidly around the axis of the tornado. Attracted by the extremely low air pressure in the center of the tornado, the water flow is sucked into the bottom of the vortex and then becomes a vortex around the axis.
Tornado, commonly known as "dragon absorbs water", is a strong wind vortex with small range and strong wind force extending from the bottom of thunderstorm cloud to the ground or water surface.
Tornado winds are very strong. Near the tornado center, the horizontal wind speed can reach more than 100 meters per second, and in extreme cases it can reach 300 meters. 12 wind speed is equivalent to more than 30 meters per second, and the damage caused is amazing.
Fourth, the fire tornado
A very rare form of tornado, consisting of tornadoes and flames.
The tornado rolled up a flame several meters high and spun like a giant fire dragon.
The main reason for the "dragon wind" is that unusually dry weather and strong winds have contributed to the fire here. The air dryness in Sao Paulo has caught up with the Sahara desert.
Fire whirlwind, also known as fire monster and fire whirlwind, refers to the rare phenomenon that when a fire occurs, the temperature and thermal gradient of the air meet certain conditions, and the flame forms a vertical vortex and inserts straight into the sky like a whirlwind. Rotating flames mostly occur in jungle fires. The height of the flame varies from 30 to 200 feet, and its duration is limited, usually only a few minutes, but if the wind is strong, it can last longer. [3]
V. Gust volume
It is a small vertical rotating airflow associated with gust front and downburst. Because they are not strictly related to clouds, it is still controversial whether they belong to tornadoes. When the fast-moving dry and cold airflow overflowed by thunderstorm flows through the static warm and wet airflow at the overflow edge, it will cause the rotation effect (which can be explained by "cirrus cloud"). If the wind shear in the lower level is strong enough, this rotation will be horizontal (or oblique) and affect the ground, and the final result will be gust. The rotation direction of gust coil is not fixed, which can be clockwise or counterclockwise.
Sixth, dust and wind
Dust wind is a special rotating convection motion caused by uneven local heating on the ground. In the process of sandstorm formation, the peripheral air flows to the center through the thin layer near the ground after being heated by the ground, and the rotational energy of the peripheral air is strengthened in the center, forming sandstorm. Its rotational energy is formed by the local concentration of the original rotational energy of thermal bubbles and the transformation of partial potential energy, and its rotational direction is determined by the initial rotational direction of thermal convection bubbles.
It is worth noting that tornadoes are completely different from sandstorms. Tornadoes are the product of thunderstorms in the clouds. A small cyclone produced by the intense warming of the ground is characterized by rolling up the dust on the ground and forming a rotating dust column with light and small objects.