Related Clues:

• Booming noise from the heavens
• Predict as with weather
• It accompanies lightning
• Noise heard after lightning
• Prediction, about the weather perhaps
• Noise named after the god Thor
• Prediction, of weather perhaps
• Booming noise after lightning
• It's below deep at the bottom, by the sound of it
• By the sound of it, comes from above, but finishes below
• From above, by the sound of it, it finishes below
• So much noise from above may get below at last
• The low part of this low sound comes at the end
• It rolls across fields
• See 16