When Hail is used, a hailstorm will begin on the field. This effect will last for 5 turns. This clears any other weather effect.
While Hail is in effect, all Pokémon not of the Template:Type2 will be damaged at the end of each turn. Synthesis, Morning Sun and Moonlight will recover only ¼ of the user's maximum HP. Additionally, Castform and the Weather Ball move become Ice-type.
Blizzard's accuracy increases to 100%, and allows it to strike through Protect and Detect with 30% accuracy.
Pokémon with the Ice Body ability recover 1/16 of their maximum HP each round. Pokémon with the Snow Cloak ability increase their evasion by 20%. If an Icy Rock is held by the Pokémon using Hail at the time of use, the duration of Hail will increase from 5 to 8 turns.