The lighting on this is freaky! The yellowness of the clouds just above as compared to the purple and blue ones in the back with the light shining through makes it seem like they are carrying some sort of poison or something. Bizarre.
As a thunderstorm pic, the storm is too far away, and not enough detail around the thunderheads. The lowflying closer clouds are obscuring too much of the storm. It would have been preferrable to leave the ground out entirely (and the bright green dot), but then you loose the 'country' connection.
How many pictures did you need to shoot before capturing the lightning?
Unfortunately, you wound up with a lot of noise in your picture. I would suggest that you crop it down some and to get rid of some of the clouds at the top and the wasted space on the left. Then I would run it through Neat Image. I think you would like the results.