What does lightning under the cloud mean?

This means there are signs of a thunderstorm.

Thunderstorm is a shower phenomenon accompanied by lightning. Produced under thunderstorm cumulonimbus clouds. It is characterized by large-scale cloud movement, which is much more violent than showers and accompanied by discharge, and is common in summer.

In the weather forecast, there are signs of thunderstorms, which means intermittent precipitation accompanied by lightning and thunder.

Matters needing attention in thunderstorm weather:

1, stay indoors and close the doors and windows. Outdoor personnel should hide in the building.

2. It is not suitable for using TV, audio and other electrical appliances without lightning protection measures or insufficient lightning protection measures, and it is not suitable for using faucets.

3. Don't touch antennas, water pipes, barbed wire, metal doors and windows, external walls of buildings, and stay away from live equipment (such as wires or other similar metal equipment).

4. Avoid using telephones and wireless phones.

5. Do not swim or engage in other water sports, do not engage in outdoor ball games, climbing, cycling and other sports, and leave the water and other open places to find lightning protection facilities.