NASA @NASA
When conditions are just right, anvil clouds will form. ☁️ You can see them in this photo an astronaut took from the @Space_Station as it orbited over Brazil. Anvil clouds penetrate the stratosphere and are often accompanied by thunderstorms. ⛈️https://t.co/xnoa1r8Iz9 https://t.co/EV0gm8OnSa — PolitiTweet.org