Signs of tornadoes

The sign of a tornado is a funnel cloud.

Tornado is a kind of disastrous weather, which mostly occurs in thunderstorm weather from afternoon to evening in summer. It has a strong cyclonic horizontal vortex, the upper end of which is connected with thunderstorm clouds, the lower end of which is suspended in mid-air, and some of which directly extend to the ground or water surface, and move forward while rotating.

Tornado is a vertical hollow or funnel-shaped rotating airflow between the bottom of cumulus and the underlying surface, and it is a disastrous weather phenomenon at local scale. Tornadoes can be found in tropical and temperate regions, including the interior of the United States, western Australia and northeastern India.

Tornadoes can occur in spring, summer and autumn, but most often occur in the transitional season of spring and summer or at the turn of summer and autumn (April ~ 10). Tornado is a meteorological disaster. Modern weather forecast can warn tornadoes through high-frequency observation, but it requires high forecasting experience.

Tornado world record

Tornadoes occur most frequently in 24 hours: 20 1 1 During the four-day storm outbreak in the southern United States, the World Meteorological Organization recorded 207 different tornadoes in the 24 hours from April 27th to 28th. The tornado claimed more than 300 lives.

2. Hurricanes caused the most tornadoes: the record was 1 19, which was set by Hurricane Ivan in the Caribbean from September 15 to September 17, 2004. (Guinness World Records) The largest tornado: the diameter is 4. 18km, which was measured by the National Weather Service in El Reno, Oklahoma on May 3 1 day, 2065438.

3. The first confirmed fire tornado: According to radar data and video data, a fire tornado occurred near McIntyre cabin in Bella National Park, Brinda on June 5th+10/October 8th, 2003.

Its moving speed is about 30 km/h, and the bottom of the fire cyclone is about 0.5 km wide when the fire is maximum. This time, the tornado was powerful enough to move cars and overturn roofs.

Baidu encyclopedia-tornado