The answer to 'why is my fascia wind damage' is that the fascia board, which is the horizontal board that runs along the edge of the roof, has likely been damaged by high winds. This can happen when the fascia board is not properly secured or if it is made of weaker materials that cannot withstand the force of strong winds.
Some common symptoms of fascia wind damage include the fascia board becoming loose, cracked, or even completely detached from the roof. This can lead to further damage to the roof and gutters, as well as allow water to penetrate the home's exterior. In severe cases, the wind may have even blown the fascia board off entirely.