Decoding air pressure on weather maps takes memorization and context clues to translate. Most station plots will depict air pressure as a set of three numbers, such as 994 or 112.

Isobars on weather maps are lines connecting locations with the same air pressure. Isobaric lines form closed loops, thereby identifying areas of low or high air pressure.

The "L" on the weather map indicates a low-pressure system. They spin in a counterclockwise direction in the Northern Hemisphere and have air parcels that converge toward the center of the low.

Pressure that is greater than the standard atmospheric pressure of 1013.25 mb is classified as high pressure and pressure that is lower than 1013.25 is classified as low pressure. On a weather map ...

One of the fundamental principles of meteorology is that air at the surface rotates around high pressure in a clockwise motion. While not always in a perfect circle for explanation's sake with a 2 ...

The lines on a surface map are called isobars. Isobars are lines of constant pressure which are measured in units called millibars. The numbers indicate the amount of air pressure, in millibars ...

Global warming is redrawing the isobars on weather maps. Researchers have found that changes in air pressure over the past 50 years bear the fingerprint of human influence 1. This is the first ...

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 ...

COMSTOCK PARK, Mich. — High pressure and low pressure are terms often used by FOX 17 meteorologists to describe the weather. High pressure is normally associated with sunny skies and fair ...