Hail IS water, it melts pretty fast.
That being said there was various rain systems that moved through here. They will check that and see its true there was rain and hail. It's one thing to have an isolated area with an issue vs. a roof that is shot.
No need for another claim. Your ins. Co will send out an adjuster to look at it and apply your coverage to the situation. You can always get a second opinion from an independent roofing company and it sure wouldn't hurt. But the age of your roof may matter if it's older. If it's newer, You may just need a repair of some kind.
Good luck.
4951