Isobar

/ˈaɪsəbɑːr/

noun

In geography, a line drawn on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.

Weather forecasters use isobars to predict the wind speed and direction.

Technical

Definition 1 of 2

Pro Tip 1/3

Isobars help forecast weather, indicating if it’s likely to be windy or calm.

Meteorologists can predict storms by analyzing the isobar patterns on the map.

Pro Tip 2/3

Isobars that are close together on a map show areas of high wind speeds.

The isobars on the weather map are so close, it's going to be a windy day.

Pro Tip 3/3

Isobars form patterns that identify high and low pressure systems on maps.

A low pressure system is surrounded by concentric isobars on the atmospheric map.

isotherm

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