: a rounded mass of cumulus or cumulonimbus cloud often appearing before a thunderstorm
Example Sentences
A thunderhead was forming to the west.
Recent Examples on the WebThen, like a tulip unfurling in the morning, a thunderhead suddenly blossomed to the south. Noah Davis, The Christian Science Monitor, 11 Aug. 2022 The quintuple-feature starred a towering thunderhead, a menacing shelf cloud, a vibrant rainbow, a glorious sunset and concluded with a fireball that shot across the night sky. Jason Samenow, Washington Post, 29 July 2022 Last Wednesday, though, conditions led to the creation of a larger, taller cloud called a pyrocumulonimbus, which is similar to a thunderhead.New York Times, 19 July 2021 Like a thunderhead, the huge cloud spawned lightning strikes, worrying firefighters because of their potential to start new fires.BostonGlobe.com, 20 July 2021 That looming thunderhead noted, the race does bring a nosegay of talent and some fine old masters at the game, among them, D. Wayne Lukas and Crowded House. Guy Martin, Forbes, 15 May 2021 Positively charged clouds rise, creating a tall cloud called a thunderhead. Rebecca Renner, National Geographic, 10 June 2020 See More