Alaska’s capital city averages a single thunderstorm every two years or so. Juneau is home to about 32,000 people and is known for its winter weather — less so for any thunder or lightning. But the city found itself under a rare severe thunderstorm warning, as the storm hit with strong winds gusting up to 60 mph.

It was a sunny afternoon until the sky abruptly darkened, heavy rain came down and winds gusted up to 60 mph. A cruise ship docked downtown broke free of its mooring and drifted into the Gastineau Channel at the height of the storm.