Spooky mammatus clouds invade skies over Tacoma

Henry Gill

For Seattle, Tuesday was a rather tranquil day, but in the South Sound, it was a bit more exciting.

A few photographers snapped photos of dramatic mammatus clouds drifting over the South Sound.

The clouds are a sign of extreme instability and turbulence in the area. They're fairly common sights in the Midwest storm season, and clouds with small mammatus bumps are have been spotted on occasion around the Northwest.

But to see such extreme "bumps" are pretty rare around here. Radar indicated some heavy rain and perhaps some small hail from the clouds, but otherwise, it passed harmlessly off to the east.

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