We see weather headlines year round from winter to severe weather in the summer, but there is a set hierarchy to them.

"The storm which prompted the warning has weakened below severe limits, and no longer poses an immediate threat to life or ...

The weather service's Storm Prediction Center — whose ... 1980s and forecasters can more reliably issue severe warnings, Howell said. The PDS term appeared in newspaper articles such as an ...

PDS warnings were first used to warn of tornado ... Center — whose mission is to provide "forecasts and watches for severe thunderstorms and tornadoes” — says that the term was first used ...

The National Weather Service's Los Angeles page screams “Particularly Dangerous Situation (PDS ... Alabama office. Past warnings The weather service's Storm Prediction Center — whose ...