When Lightning Strikes

By Dave Anderson on Thursday, July 30, 2009.

What happens to trees struck by lightning?

It's late afternoon and a dark armada of thunderheads descends from the rolling Green Mountains of Vermont to make landfall in New Hampshire. Birds grow silent. Leaves rustle ominously. The sky glows a weird metallic green. A jagged bolt of lightning stabs a tall white pine.

Its top explodes as the bolt spirals down the trunk. The wood splinters violently as bark is blow off and scattered like shrapnel. Exposed sapwood glows yellow in the newly-opened fissure. Where the lightning hit the ground, small stones and soil are thrown clear like exclamation points. The mighty pine is smoked; struck dead in an instant. Typically the tallest trees in the woods, white pines make natural lightning rods.
An electrocuted pine will eventually shed the rest of its bark in large plates to reveal cooked sapwood beneath. Seared pine pitch seals the heartwood, like varnish, against moisture and beetles that specialize boring holes in wood. Unlike pines that die, fall and rot due to insects and moisture, heat-killed snag trees can remain standing for decades!
Snags provise durable wooden apartments for a variety of wildlife. Cavities inside these smooth gray ghosts are used by woodpeckers, flycathers and owls for nesting; and by bats as nursery colonies and day roosts. Squirrels, raccoons, porcupines and fishers use the lightning killed durable snags for dens.
In the woods, every ending is a new beginning. Standing dead trees are considered a biological legacy- an integral part of a healthy forest. Even in death, these lightning-killed trees live on.

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lightening struck pine

Last year we had just come home-let the dogs out and thought something looked different. Apparently a 50' white pine had been hit by lightening. The top half blew off and "dropped " just beside the trunk. A lateral limb caught in the split and stopped it from falling to the ground.It looked like the tree had shrunk. There were splinters every where. Some up to 20'long. The house was not hit thankfully. We had never heard of this happening but of couse some tree people and oldtimers had.
The force of nature is just too cool sometimes.

Lightning strikes

Diane, thanks for sharing that story.
The lightning strikes can be very violent and I've witnessed a few scary strikes from afar and then hiked in to find the tree that was hit. Fascinating to see the damage done. And lighting does indeed strike twice in the same place apparently! Thanks for listening.
- Dave Anderson