Taylor Fitzpatrick asks, "Why are the clouds dark when there is a thunderstorm?"
Great question Taylor!
Simply put, storm clouds carry many more water droplets that are also larger than the tiny droplets in regular clouds.
These larger water droplets absorb and block sunlight from shining through and this is what makes them appear darker.
And naturally, dark storm clouds containing more droplets of water will also produce heavier rain showers, and oftentimes thunderstorms with frequent lightning.
Air rising rapidly within the storm clouds leads to lightning, gusty winds and heavy rainfall.