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

PDS warnings were first used to warn of tornado outbreaks in the Midwest. More than a decade ago, three meteorologists proposed expanding their use to disasters such as ice storms, floods ...

PDS EXPRESSES THE URGENCY AND WATCHES OR WARNINGS FOR UNUSUALLY EXTREME AND LIFE THREATENING SEVERE WEATHER. THIS SITUATIONS ARE RARELY ISSUED, BUT CAN BE FOUND ALONGSIDE FLASH FLOOD EMERGENCIES.

Advertisement Article continues below this ad PDS warnings were first used to warn of tornado outbreaks in the Midwest. More than a decade ago, three meteorologists proposed expanding their use to ...

PDS warnings were first used to warn of tornado outbreaks in the Midwest. More than a decade ago, three meteorologists proposed expanding their use to disasters such as ice storms, floods ...

PDS warnings were first used to warn of tornado outbreaks in the Midwest. More than a decade ago, three meteorologists proposed expanding their use to disasters such as ice storms, floods ...

The National Weather Service's Los Angeles page screams “Particularly Dangerous Situation (PDS)” in hot pink letters against a gray background.It's a rare warning aimed at seizing attention ...