41.   Frigid air will cover the northeast quarter of the nation Thursday as the coldest air mass of the winter migrates toward the East Coast.

42.   Humid air will cover most of the eastern states on Tuesday.

43.   In the meantime, ample sun and very warm air will cover an expansive area from the eastern Rockies to southern Plains.

44.   In the wake of the front, much cooler air will cover a large area from the northern Rockies to the Great Lakes states.

45.   Meanwhile, dry and cool air will cover the Northeast quarter of the nation.

46.   Meanwhile, despite mainly sunny skies, unusually chilly air will cover interior sections of the Southwest with record chill possible over Nevada and Utah Wednesday night.

47.   Mainly dry air will cover the Western states as high pressure strengthens over Colorado.

48.   Milder air will cover the Rockies while the West Coast remains dry with abundant sunshine.

49.   Mild air covered much of the East Coast last month.

50.   Mild and rather humid air will cover areas from the eastern Tennessee Valley to the Southeast coast.