This unceremonious end to a perfect beach day is brought to you by hail.

Beach-goers in Novosibirsk, Russia, were surprised when their picture-perfect sunny day was ruined by a quick-moving thunderstorm and hailstorm. As the ominous clouds moved over the area on Saturday, the temperature plummeted from 105 degrees Fahrenheit to 71 degrees Fahrenheit, with the skies opening up in a barrage of ice. Beach patrons ran for cover as the hail, which has been described as golf ball-sized, rained down.

According to the National Oceanic and Atmospheric Administration (NOAA), hail causes more than $1 billion in damage to crops and property every year in the United States. It's created when "updrafts in thunderstorms carry raindrops upward into extremely cold areas of the atmosphere where they freeze into balls of ice," according to NOAA, and the ice can be suspended aloft by the storm's powerful updrafts until it gets so large that it falls to the ground.

It doesn't appear as though anyone was seriously hurt by the hailstorm, but according to The Telegraph, the storm system caused harm in other parts of Russia. In the video, you can see people screaming and running for cover.

But you've gotta wonder why, as a thunderstorm approached, the beach-goers stayed put on the sand for that long.

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