Rossby waves are the large bends or meanders in the jet stream. When the jet stream dips southward, meteorologists call it a trough, which typically allows colder air to spill southward. When the jet ...

When you flip the thermostat down on a sweltering afternoon, you might not think about what's happening five or six miles above your head. Yet the behavior of high-altitude winds called jet streams is ...

A tornado outbreak has left at least six people dead and caused significant damage as severe weather moved from the South to the Midwest.