The National Weather Service is creating a new “destructive” severe thunderstorm category that will trigger alerts on all mobile devices.
Starting July 28th, the Weather Service is adding a “damage threat” tag to Severe Thunderstorm Warnings. Severe thunderstorms can now be classified under three categories: destructive, considerable, and base.
Destructive storms must have hail over two-point-seven-five inches in diameter and winds over 80 miles per hour. Warnings labeled destructive will automatically activate a Wireless Emergency Alert on smartphones within the area.