1.   Meanwhile, isolated storms will form in the Middle West as an approaching cool front interacts with increasingly humid air.

2.   Potent storms will also develop in the northern Plains as a front interacts with a jet stream disturbance.

3.   Some moderate to locally heavy thunderstorms are possible Thursday in parts of southern Florida as a front interacts with warm, humid air.

4.   Thunderstorms will also develop in the southern Mississippi Valley on Monday as the same front interacts with an upper-level disturbance and humid surface air.

5.   Thunderstorms will speckle parts of Florida Saturday as a weak front interacts with sultry air.