Question

The weather is warm and dry what changes would a cold front bring

Answer 1

A cold front separates a cold, dry air mass from a warm air mass.

Answer 2

Before a cold front comes:The temperature will be warm.
There will be short rain showers.
During a cold front:The temperature will decrease and become cold.
There will be heavy rain with hail, thunder, and lightning.
After a cold front has passed:The temperature will continue to drop.
The rain will stop and the skies will clear.