Is there a fire tornado?
fire tornado, also known as fire monster and fire whirlwind, refers to a rare phenomenon that when a fire breaks out, the temperature and thermal gradient of the air meet certain conditions, and the flame forms a vertical vortex, which goes straight into the sky like a whirlwind. Rotating flames mostly occur in bush fires. The height of the flames varies from 3 to 2 feet, and the duration is limited, usually only a few minutes, but if the wind is strong, it can last longer.
practical case
1. fire tornado, Wisconsin, USA
On October 8, 1871, a forest fire swept across the banks of Grimbe Bay in the northeast of Wisconsin, with a total of 1 people killed.
At the beginning of October that year, it was a typical Indian sunny and warm weather in late autumn: the breeze was blowing and the air was warm and dry. In the past few weeks, there have been many small bush and forest fires here, which are mostly caused by a large number of branch rights left by loggers. When the wind is light, the workers and the people nearby can still control the fire. However, on October 8, it was Sunday, and the southwest wind increased, making many small fires develop into raging fires. At the same time, the temperature increased significantly. From the observation records of Milwaukee Station, the highest temperature was 19℃ on October 7, and it rose to 28℃ on October 8. By the evening of October 8, two major forest fires were slowly advancing to the northeast from the vicinity of Grimbe City. Although the residents tried their best to put out the fire and tried to stop it from spreading, the fire was ruthless, and a large number of houses were destroyed in the path, and all villages from Franken in the east to Peshti Ge in the west were burned down. [6]
2. fire tornado, California
On November 15, 28, in the fire in Corona, California, a fire tornado gradually approached the residential area. Fire tornado's passing place will ignite objects in the area, and can also throw burning debris around. The wind current formed by the huge fire tornado is also very dangerous, and its wind speed can reach 16 km/h, which is enough to blow down trees.
3. fire tornado, Sao Paulo, Brazil
On August 24th, 21, residents of Sao Paulo, Brazil photographed the rare natural phenomenon of "fire tornado". This natural phenomenon is due to a tornado passing through a burning field and then turning into a huge burning "fire dragon".
It hasn't rained for three months in the area where fire tornado appeared. The unusually dry weather and strong wind contributed to the fire here. Brazil's global television reported that the air dryness in Sao Paulo has caught up with the Sahara desert.
This "dragon wind" flies about several meters high in the burning field, blocking a highway. In order to put out this "fire dragon", local helicopters were dispatched. At the same time, in order to prevent new fires, the municipal government of Sã o Paulo has ordered the prohibition of burning crops after wheat harvest.
4. fire tornado, Australia
According to British reports, on September 17, 212, a fire tornado with a height of 3 meters appeared in Alice Springs, Australia. According to eyewitness Chris, the fire tornado lasted for more than 4 minutes. "fire tornado" appeared in the remote inland, causing no casualties.
5. fire tornado, Missouri, USA
On May 3, 214, an American woman photographed the rare phenomenon of "fire tornado" ("fire tornado"), and the scene was spectacular. When Coplin drove her daughter and friends for a ride near St. Joseph, Missouri, a local farmer was burning fields. To Copelin's great surprise, a "fire dragon" appeared in the field, which went straight into the sky. It turned out to be a rare "fire tornado" phenomenon. Coplin stopped the car, photographed this spectacular scene and shared it online. "This is the coolest and scariest thing I have ever seen," said Coplin.
from Baidu encyclopedia.