Tornadoes can occur without funnel clouds, as shown in this example from NSSL. The dust cloud and cloud base above it were rotating, indicating a continuous cloud-to-ground vortex (tornado). The lack of a visible funnel can be related to several processes.

2023年11月20日 · Technically, some tornadoes are invisible. What makes a tornado visible can be the rainwrap or dirt/debris picked up by the tornado itself. There are of course tornadoes that are fully condensated, but their will always be tornadoes that are barely visible

2016年5月19日 · Also, in high precipitation supercells, tornadoes can be rain-wrapped, making it practically invisible to the naked eye. It's a storm chaser's worst nightmare because the tornado is there and destructive, but without the help of radar, you have no idea where it is because there's just so much freaking rain!

One cannot see a column of air and wind that is rotating on a vertical axis between the cloud base and the ground unless there is a visible condensation funnel inside the invisible tornado, or one sees rotating dirt/debris at the ground level.

2014年8月26日 · Airborne dirt and debris carried aloft by a tornado’s winds make the funnel visible. Videos of tornadoes in action show that such material is sometimes raised only a few hundred feet, with the...

An invisible “tube” of air begins to rotate horizontally. Rising air within the thunderstorm tilts the rotating air from horizontal to vertical – now the area of rotation extends through much of the storm. Once the updraft is rotating and being fed by warm, moist air flowing in at ground level, a tornado can form.

2022年3月27日 · Tornadoes are invisible. When we see a tornado dropping from a storm cloud, what we are actually seeing is the condensation funnel caused as water droplets condense in response to the pressure drop that occurs within the invisible vortex of …

2015年4月20日 · You can have part of the tornado be invisible, near the ground. However this is usually only for a short period when the tornado first hits the ground, before the condensation funnel reached the ground.

2023年4月9日 · Now, satellite imagery has revealed a 60-kilometer-long track of moist earth in Arkansas that was invisible to human eyes. The feature was presumably excavated by a tornado when it stripped...

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