Wind
High winds can remove or tear shingles, leaving the underlayment, roof deck, or waterproofing material exposed to the elements. During less severe storms, sudden, sharp gusts of wind can lift shingles. When shingles are installed, they’re purposefully overlapped to create a water-tight seal, and this lifting and curling can break this seal, potentially leaving your roof vulnerable to damage from wind-driven rain.
Hail
While hailstorms tend to be relatively short, and rarely last for longer than 15 minutes, hailstones can leave dents or pockmarks in shingles and knock shingle granules loose. This can be problematic because these granules help protect your roof against rain and sun damage. Hail damage can also ruin the pleasing aesthetic appearance of your roof’s surface.
Debris
Depending on how severe the storm was, debris can end up on the top of your roof, everything from small branches to larger tree limbs. Large objects can dent or impact the surface of the shingle, leaving that area of the roof vulnerable to moisture intrusion, whereas lighter branches may not be as much of a problem.