This first panel shows the beginning of this dramatic irony and suspense. It's a harsh, weather condition where the tiles of the roof were flying away. But the story included this for a bigger picture of the suspense in the story and to show violence in the story.
The second panel is when the hens wake up in the night because they thought that they heard a gun shot. This lets the reader know that the humans are up to something, probably with the windmill. The thing is that the animals don't know and it's creating a intense feeling. This could also show us that we know it was the storm instead of the gun shots that woke up the hens
The last panel shows the next morning when all these things were destroyed but the one that caught the animals the most was the destroyed windmill. We already knew what happened and it turns out that Snowball was responsible for it. Now Napoleon is really fired up which gets the readers thinking that this story is not ending pretty.