You insurance company most likely has its own guidelines to how long you can take to make a claim against your policy for damage such as hail damage. Check with your insurance agent to see if the 6 month old damage can still be claimed. You state also probably has its own state laws regarding the time limit for claims being made to an insurance company and the length of time they can take to respond.

Hailstorm Causes Vehicle Damage is a news article you might find of interest.