The towering cumulonimbus cloud darkens the sky to a piercing black ... “It was great to be out in a convertible, racing the storm with the guy who wrote the song ‘Thunder Road ...

Technically called “cumulonimbus flammagenitus,” pyrocumulonimbus clouds are a rare weather ... This produces thunder, rain, and occasionally even tornadoes. Lightning strikes from the storm ...

Supercells are typically also classified as severe thunderstorms, and tornadoes most commonly ... produced from cumulonimbus or thunderstorm clouds. A bigger hail stone signifies a longer lifespan ...

In the case of a tropical cyclone, they appear around a day before the storm’s center reaches ... nimbostratus, and cumulonimbus clouds (with “nimbus” meaning precipitation in Latin).

Sudden darkness and a cold wind can be signs that cumulonimbus clouds is approaching and there is a risk of strong wind gusts and tornadoes. Please refer to NHK’s guide on how to protect yourself.