Philo Nordlund / Flickr

If you live in the Pacific Northwest, a scary lightning strike isn’t very likely.

But there was one recently in Seattle’s Arboretum that could be a case study in a text book.

“The lightning bolt went right down the moist center of the tree, blew the tree out and so it just spread apart,” Mass said.

He says in this case, the lightning hit just right and heated up the moisture at the core of the tree, causing steam to form and blast it into pieces.

“Pieces of that tree were sent off as projectiles, hundreds of feet away,” and embedded themselves deeply into the ground because of the force of the blow.

“It was amazingly dangerous,” Mass said.

“And there’s been explosive trees around here before; this is not the first incident. But it’s probably the most dramatic I’ve ever seen,” he said.

He says he’s never seen anything like it, at least not in nature.

“It looked like one of those onions you get at Safeco Field,” he said.

In this week’s episode Mass explains why lightning strikes are relatively rare here, why the recent one near the Arboretum visitor center was so forceful and how to position yourself on the off chance that you do get caught in a lightning strike.

Tim Durkan

Photographers in the Puget Sound area captured these striking images on Friday, Aug. 9, 2013. Here are a few by Seattle photographer Tim Durkan. 

Here's one from photographer Gary Deyo. 

Jim Stiles captured the lightning storm in the Cascade Mountains. "The raw power of Mother Nature!" he wrote.