When surface cyclones form, they almost invariably occur just ahead of an upper air ridge.

Name: When surface cyclones form, they almost invariably occur just ahead of an upper air ridge.
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Surface cyclones can form in various situations, such as when cold and warm air masses collide or when tropical systems move over cooler waters. While upper air ridges can contribute to the formation of surface cyclones, they are not the only factor.

When Surface Cyclones Form, They Almost Invariably Occur Just Ahead