21.   More chilly, moist air will sweep into the Northwest behind a strengthening cold front in the northern Rockies.

22.   Milder air will sweep across the northern and central parts of the Plains and Mississippi Valley.

23.   Much cooler air will sweep southeastward across the Texas and Oklahoma panhandles while it becomes mainly sunny and cooler in the southwest Plains.

24.   Much cooler air will sweep into the Northeast, and New England on Friday in the wake of a cold front.

25.   Much cooler and drier air will sweep into the Northeast on Monday in the wake of a cold front pushing off the East Coast.

26.   Much colder air will sweep into the interior Northeast behind a front pushing off the East Coast.

27.   Much colder air will sweep into the Northeast behind a strong front pushing off the Atlantic coast.

28.   Otherwise, drier air will sweep into the region, causing clouds to break during the day.

29.   Significantly colder air will sweep across the upper Midwest on gusty winds behind the system.

30.   Snow showers will fall in the northern Appalachians, while colder, drier air will sweep across the Middle Atlantic States.