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Northern Tas lightning pretty but scary

AAP logoAAP 22/11/2016 Andrew Drummond

Mother Nature has turned on a scary but spectacular lightning show for parts of northern Tasmania.

Social media on Tuesday lit up with footage and photos after residents across the top half of the island state captured overnight evidence of what the Bureau of Meteorology has since described as a "pre-frontal trough".

"It was a pretty display of lightning, accompanied by some thunder, and that was the most of it," senior forecaster Glen Perrin told AAP.

"There was nothing in particular in the way of winds or hail."

Some footage online shows repeated horizontal bolts accompanied by deep rumbling cracks of thunder.

"The scariest thing I have ever witnessed," commented one keen videographer, citing "powerful lightning" in Launceston.

The front passed over King Island about 6pm (AEDT) and reached Launceston by 8.30pm before moving off the state's east coast about 11pm.

The BoM's satellites and radars detected prolonged storm activity but couldn't pinpoint the exact number of strikes.

"It was a large number strikes, that's for sure - certainly a little bit unusual to see such a large number of strikes in such a small area," Mr Perrin said.

The storm preceded a cool front which brought an end to higher-than-average temperatures across most of Tasmania on Monday.

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