Folks in tornado-land are well aware there are many official methods for alerting the public about severe weather and Twitter was never one of them. They are all free, reliable, and around for years. See NWS SAME service. Also the "emergency alert" feature on all modern phones. The WWW (of which Twitter is a part) is simply an unreliable method for communicating emergency alerts. More "spaceman bad" manufactured outrage from the legacy media.