Which type of weather will most likely cause intense thunderstorms

1 . a cold front that joins with a cold front over the pacific ocean

2 . a cold front that stays over the great lakes

3 . a warm front that moves steadily along the east coast of the united states

4 . a warm front that meets a cold front along the central part of the united states

A warm front that moves steadily along the east coast of the United States.

Explanation:

A stalled weather system that has been bringing rain to parts of the Southeast will begin to slide northward over the next day bringing with it pop up thunderstorms and heavy downpours up and down much of the east coast and to parts of the Midwest.As a cold front slides eastward and interacts with tropical moisture, it will likely cause pop up thunderstorms in parts of the northeast on Monday, with locally heavy downpours possible.