Unusual weather phenomena refer to rare atmospheric events that deviate from typical weather patterns. Examples include ball lightning, a mysterious glowing sphere that appears during thunderstorms, and sundogs, bright spots that appear on either side of the sun due to ice crystals in the atmosphere. These phenomena can be fascinating but often perplex scientists. Another example is freak hailstorms, which can produce hailstones larger than golf balls, causing significant damage. Tornadoes can also exhibit unusual behavior, such as changing direction suddenly or forming in unexpected locations. Understanding these events helps meteorologists improve forecasting and safety measures.