11.   Cold air will cover all of the Northeast Tuesday, but winds will diminish.

12.   Colder, moist air will cover much of the upper Ohio Valley and western Great Lakes.

13.   Comfortably dry air will cover much of the Northeast and Middle Atlantic states with ample sunshine, though some clouds will linger in northern New England.

14.   Cool air will cover a large portion of the East Friday as a trough in the jet stream directs chilly air southward from Canada.

15.   Cooler air will cover most of the northwestern third of the nation with patches of showers.

16.   Cool and dry air will cover the Northern Plains and Great Lakes with sunshine yielding to puffy afternoon clouds across the region.

17.   Cool, dry air will cover the Great Lakes with sunny skies in the central sections.

18.   Cool, unstable air will cover the Northeast as an unseasonably strong low-pressure area becomes nearly stationary over southeastern Canada.

19.   Cooler and much drier air will cover the South and Mississippi Valley as high pressure over the Gulf of Mexico controls the weather.

20.   Cooler, less humid air will cover the northeast Plains.