41.   Strong thunderstorms will erupt from Kentucky to Maryland as a slow cold front undercuts and lifts sultry air.

42.   Such elevated levels of water vapor act like volatile fuel for explosive thunderstorms that are sparked whenever approaching low-pressure systems rapidly lift moist air.

43.   The greatest threat for severe weather will be in the Middle Atlantic states as very warm, humid air is lifted by an approaching cold front.

44.   The heaviest rain and a few thunderstorms will occur where converging winds lift relatively humid air from southern Ohio to the mountains of West Virginia.

45.   The heaviest storms are likely across the upper Middle West, as moist air is lifted by a vigorous jet stream disturbance.

46.   The heaviest rain in more than a month will soak parts of the Northeast seaboard on Sunday as warm, humid air is lifted by an approaching cold front.

47.   The piecemeal rains were generated by a developing low pressure system over the central Plains that lifted moist air streaming north from the Gulf of Mexico.

48.   The sea breeze front will wedge under and lift warmer air over land.

49.   Thunderstorms will also develop near the Gulf Coast from Louisiana to the Florida panhandle as sea breezes lift torrid air.

50.   Thunderstorms will erupt in parts of the Northeast on Friday as a cool front approaching from the west undercuts and lifts humid air arriving on breezes from the south.