21.   High pressure will strengthen over the western Atlantic, and its broad circulation will draw tropical air into the eastern half of the nation.

22.   Hot and very humid weather is expected along the Atlantic Seaboard as tropical air is circulated into the region ahead of a cold front.

23.   However, on descent toward earth, hailstones typically melt before reaching the ground as they pass warm tropical air at lower altitudes.

24.   Humidity will also soar as tropical air streams northward from the Gulf of Mexico.

25.   In March, these storms can draw tropical air north as easily as they bring vestiges of winter south.

26.   In March, storms can draw tropical air north as easily as they bring the last vestiges of winter south.

27.   In March, these storms can draw tropical air north as easily as they bring last vestiges of winter to the south.

28.   In March, these storms can draw warm tropical air toward the north as easily as they bring the last vestiges of winter south.

29.   Low pressure east of the Carolinas will circulate sultry tropical air toward the coast.

30.   Meanwhile, a dome of tropical air preceding the hurricane will expand into the Middle Atlantic States.