The concept of frontal zones led to the concept of air masses.

The system moved westward, eventually "shearing to death" as it raced ahead of a frontal zone.

On July 27, the former hurricane merged with a frontal zone.

There are two different words used within meteorology to describe weather around a frontal zone.

These can include sound speed profile fine structure and frontal zones as well as internal waves.

Precipitation was further increased by a frontal zone to the hurricane's north.

Isidore fell apart again and was last seen on September 27 before it went into a frontal zone in Pennsylvania.

An area of low pressure detached from a frontal zone on August 4 and moved southwestward.

The northeast portion became associated with the approaching frontal zone, and was briefly monitored for signs of development.

Migratory pressure systems and frontal zones exist on this scale.