The answer to 'why is my flashing wind damage' is that the flashing on your roof has likely been damaged or dislodged by strong winds. Flashing is the thin metal or plastic material used to seal the joints and gaps around roof features like chimneys, vents, and edges. Over time, high winds can loosen or tear the flashing, allowing water to leak into your home.
Common symptoms of wind-damaged flashing include visible gaps or holes, the flashing being bent or curled, and water stains or leaks around the affected areas. To fix this, you'll need to inspect the flashing, re-secure any loose pieces, and replace any severely damaged sections. For extensive damage, it's best to call a professional roofer who can properly assess and repair the issues.