Power flashes are almost universally referred to as 'exploding transformers'. However, 'exploding transformer' is an incorrect term, as transformers are rarely the source of these arcs. A 'power flash' is simply an arc caused by a shorted-out power line. These short-circuits can occur anywhere on the power grid where live wires are allowed to contact each other, grounded objects or the earth itself. While power flashes sometimes do occur at an actual transformer, they are typically not associated with one.

There are three ways power lines can contact each other or the ground and cause a short circuit and resulting arc:

- Damage or collapse of the wires' support system (telephone poles, insulators or crossarms) due to external force (wind, ice).

- External forces (such as strong wind) causing wires to move and touch each other.

- A conductive foreign object (such as a wet tree branch, bird or squirrel) resting across two live wires.

Originally posted by Ophiuchus 13

I was leaning more towards this explanation, just seemed wierd no thunder just 2 light flashes and that was it. Thanks for you input also.