cold front
polar front

"A strong cold front moved into the area in the early evening hours."

Around the same time, the nearby cold front created a low pressure area.

A cold front was moving in, and rain could not be far off.

At that moment, both the warm and cold front are very large.

By the middle of next week, a cold front is expected to move into the area.

The weather calls for a cold front in the final week of the season.

I'll admit I could do with a good cold front, though.

It usually takes a cold front to force out or break down the high pressure.

A new low pressure area formed along the system's cold front to its south.

The cold front had come in on schedule and was making itself felt.