No? I am not saying those weather events don't exist - I am saying that there is a very large class of weather events that happen with high frequency, and affect life on the ground significantly, and those include severe thunderstorms that could have early detection through smartphones.

Planes and aviation could have major assistance in planning and adjusting to weather events if a phone network were actively in use as well.

Last second info re: waiting for planes to take off due to weather delays is one of my primary frustrations. It hurts a lot of people and companies to have last-second changes to forecasts and I would like to reduce that pain point by providing further advance notice of likelihood of severe weather in an area. This can be done (partially) with phone sensors.