A warm front that moves steadily along the east coast of the United States.
Step-by-step 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.