11.   A pair of low pressure areas forming off the Southeast coast will bring torrential rain to much of Florida.

12.   A few showers could develop from Iowa to the western Great Lakes later Wednesday as a low pressure area draws moist air north from the Mississippi Valley.

13.   A nearly stationary high pressure area resulted in several days of steadily sinking air that made the Canadian air mass the warmest in all of North America.

14.   A tandem of low pressure areas will promote inclement weather in most of the Southwest.

15.   A warming trend will develop across the Mississippi Valley as breezes from the south develop on the western flank of the high pressure area.

16.   A weak, moisture-starved low pressure area will move rapidly east from the eastern Dakotas.

17.   Clockwise flow around high pressure areas brings brisk winds from the east, which regularly push the chilly maritime air out to sea.

18.   Clouds, cool northeasterly breezes and few sprinkles will linger near the Outer Banks of North Carolina in the wake of a low pressure area offshore.

19.   Clockwise flow around high pressure areas brings brisk winds from the east, which temporarily push the maritime air out to sea.

20.   Clouds and intermittent snow will accompany a fast-moving low pressure area as it moves southeast from Michigan toward the central Appalachians.