The Power of God in the thunderstorm
The psalm speaks of the LORD 18 times and the "voice of the LORD" 7 times. 
The Canaanites believed that Baal controlled the storm and the lightning. But the things that psalms attributes to Baal, the Bible attributes to YHWH. 
The showdown between Elijah and the prophets of Baal is about who controls these the storm, the lightning, and the weath. 

29:1-2 A Call to Praise God

29:3-9 The glory of God in the thunderstorm

29:10-11 The LORD as King forever

Jesus fulfills Psalm 29
The "voice of the LORD"  could be tied with Jesus as the Word- John 1:1
The heavenly being- ESV- praising God in vs. 1-2 finds fulfillment in Luke 2:10-11.
Jesus demonstrates His control of the storm in Mark 4:35-41
Jesus walks on the water in Mark 6:45-52 and shows His control over the elements.
Jesus can turn water into wine- John 2:1-11.