21.  Ahead of the front, warm and humid conditions will cover most of the East.

22.  Air that originated over mild Pacific waters will cover most of the nation, resulting in temperatures near normal or above.

23.  But it is even more crucial, because it covers most of the planet.

24.  By afternoon, ample sunshine and mild conditions will cover most of the region.

25.  By Monday afternoon, sunshine will cover most of the Northeast as the low-pressure zone moves farther out to sea.

26.  Chilly air will cover most of the West.

27.  Cloudiness will cover most of the eastern half of the nation as a pronounced jet-stream disturbance slowly moves across the region.

28.  Clouds will cover most of the middle of the country as winds from the south direct warm and humid air over cooler air occupying the northern half of nation.

29.  Clouds will cover most of the Northeast with sunny spells expected Tuesday afternoon from New York southward.

30.  Chilly breezes and sunshine will cover most of the Southeast as sprawling high pressure moves east from the Mississippi Valley.