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 ...

High temps will be in the low-mid 80s. I’ll have more details on the weather between tomorrow and Sunday in tomorrow’s weather blog. Meteorologist: Jeremy Wheeler ...

Areas of high pressure are characterized by sinking air, which tends to warm and lead to sunny, pleasant weather. In low pressure areas, the air rises, cools and condenses into clouds, leading to ...

Simply put, on a 500-millibar (mb) map, one of the key ways of observing the upper atmosphere, when there is a ridge, it appears as a hill-like shape and indicates high pressure, which generally ...