P HAIL DAMAGE THRESHOLD SIZES FOR COMMON ROOFING .
The hail size necessary to inflict propertydamage was the subject of a recent NWS (National Weather Service) committee meeting on reevaluating the national severe thunderstorm warning criteria. The lead author served on this committee. The authors' firm had impacted common roofing materials with simulated hailstones to determine threshold sizes needed to initiate damage. A mechanical launcher ...