Understanding atmospheric pressure is vital, newsroom meteorologist Justin Ballard said, because those giant H’s and L’s representing high and low air pressure systems on a weather map are ...

With high pressure, we can expect fewer clouds and low rain chances. During summer, high pressure often brings clear skies and hot temperatures. Of the main reasons for this is sinking air, also ...

High-pressure systems (where air pressure is relatively high) are associated with clear and dry weather, while low-pressure systems are associated with rising air, cloudiness and rain ...

An area of low pressure is now approaching the east coast of Florida. It'll come onshore this morning somewhere between Titusville and Daytona Beach.

A record-strong low-pressure system will steer an atmospheric river into California, create blizzard conditions in Washington and bring strong, damaging winds. Up to 20 inches of rain expected in ...

An upper level low as a swirling pocket of colder, low-pressure air high up in the atmosphere. RELATED: Swap out your gas powered lawn tools for new electric ones for free in DC area.

Record-low air pressure headed to St. Louis may worsen migraines and joint pain, research says The region could be hit with the lowest air pressure reading in March since the '70s, meteorologists ...