61.   However, if arctic air arrives on northerly winds, its chill is preserved as it presses south over land.

62.   However, immediate coastal areas of southern New England will mix with or change to rain for a time as slightly milder ocean air arrives.

63.   However, unusually frigid air arrived from Siberia this week.

64.   In its wake, Canadian air arrived, helping to maintain the pattern of unseasonably cool weather gripping the Northeast.

65.   In New England, noticeably colder air will arrive on gusty winds from the northwest in the wake of a cold front.

66.   In most years, the humid air arrives in the desert Southwest during the first two weeks of July.

67.   In the meantime, sinking air currents will promote ample sunshine across most of the northern Plains, as milder air arrives from the west.

68.   In the wake of the low, clouds will break from the Ohio Valley to the interior Northeast as drier air arrives on gusty breezes from the west.

69.   In the wake of the low, cooler and drier air will arrive over the Northeast, but temperatures will remain above average.

70.   In the wake of the cold front, drier and cooler air will arrive from the interior Southeast to the Ohio Valley.