They can be. The apparent color of a tornado's funnel depends on the lighting conditions. A tornado that is lit up from the front will appear light gray or white, while a tornado lit from behind will appear dark.
The link below shows a comparison of two pictures taken from opposite sides of the same tornado at nearly the same time, but from opposite sides.
It depends what you call a tornado. Most tornado-like clouds do not touch the earth's surface. Some say that until it touches the ground it is not a tornado but a funnel cloud; however the definition of a tornado does not state that it must touch the ground. It all depends on what you're taught.
Tornadoes typically start from the cloud base and extend downwards towards the ground. The rotating column of air becomes visible as it picks up debris and dust from the ground, giving the appearance of a funnel shape.
Tornadoes can appear as dark, funnel-shaped clouds before they come into contact with the ground and pick up dust and debris. These rotating columns of air can sometimes be difficult to see until they gather enough moisture or dust.
Tornadoes typically form within cumulonimbus clouds, which are large and vertically developed clouds associated with thunderstorms. These clouds can have a distinct anvil shape and may exhibit features such as a rotating updraft known as a mesocyclone. However, tornadoes themselves are not visible until they make contact with the ground, at which point they can pick up debris and dust, creating a visible funnel cloud.
No, Tornadoes start inside the clouds of their parent thunderstorms and descend towards the ground. Somtimes they can appear to form up from the ground because the vortex is just swirling air when it reaches thr ground and therefore cannot be seen until it starts picking up dust from the ground.
No. Tornadoes may be obscured by rain or the dark of night. A tornado that forms in a pocket of dry air with little or no dust that can be picked up will likely be invisible until it hits moister air or starts lifting dust or debris.
Grounding the club means actually touching the club to the ground when the ball is in a hazard. The club cannot touch the ground until you make you swing.
When a tornado hits the ground, it can cause significant destruction by uprooting trees, damaging buildings, and tossing debris into the air. The swirling winds can reach extreme speeds, creating a wide path of devastation in its wake.
To level the ground effectively using a roller, first ensure the ground is clear of debris. Then, fill the roller with water or sand for weight. Roll the roller back and forth over the uneven areas, applying pressure evenly. Repeat as needed until the ground is level.
Tornadoes produce very powerful winds that can tear apart buildings or push them to the point of collapse. Buildings may receive lesser damage as the winds tear away pieces, or push in parts until the buckle. The wind can also pick up objects, such as pieces of buildings and turn them into flying debris, which can cause even more damage. Most people who die in tornadoes are struck by flying debris or are crushed under calling objects or collapsing buildings. Less often people may be lifted up by the winds and hurled to their deaths.
It is not known as there are no accurate records going back that far. The United States keeps the most detailed records, and even then official U.S. records only go back to 1950 and do not accurately record the number of tornadoes until the 1990s. Most countries do not keep detailed records of tornadoes and many tornadoes that touch down are never recorded. At a guess, based on U.S. statistics from the past couple decades, the worldwide number of tornadoes in the past 100 years is probably in the hundreds of thousands.
Not usually. Although the vortex must touch the ground in order to be considered a tornado, most tornadoes form within the clouds of a thunderstorm and extends downwards. Though often a developing tornado is not highly visible until it reaches the ground and starts lifting up dust. However, landspouts are a type of tornado that form from the ground up and connect to the base of a thunderstorm, usually one in the developmental stages.