Here's why:
* Hail is formed when strong thunderstorms produce ice pellets that are larger than 5mm in diameter. These storms can occur anywhere, including over wetlands.
* Sleet forms when rain freezes as it falls through a layer of below-freezing air. This can happen in a variety of weather conditions, including those that may occur over wetlands.
Therefore, it is not accurate to say that wetlands never get hail or sleet. They are just as susceptible to these types of precipitation as any other geographic area.