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High Pressure Systems - Windows to the Universe

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The air moving away from the High pressure system leaves a “hole” to be filled, so air from above sinks into that “hole”.
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High Pressure Systems

Have you ever seen a weather map with a blue H on it? This blue H means there is a high pressure system over that area of the map. Just what does that mean?

It means that that area has higher pressure then the air around it.

When there is a High above your house, you should expect clear skies and no rain or snow! The way I remember it is that a High will make my spirits high because good weather is on the way.

Last modified April 19, 2009 by Jennifer Bergman.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF