71.   Arctic high pressure will control most of the Plains states.

72.   Areas near the East Coast will experience bright sunshine, where retreating high pressure will provide mild readings and breezes from the south.

73.   Arctic high pressure over Quebec will keep the interior Northeast cold, but not as frigid as recent days.

74.   Arctic air will loosen its grip on the northern Plains Friday as a warm ridge of high pressure builds eastward from the Rockies.

75.   Anticyclogenesis, the process by which high pressure systems develop, usually gets less attention, given that highs are associated with fair weather.

76.   As a high pressure system drifts east from Louisiana, humid air will stream northward from the Gulf of Mexico.

77.   As cold air from high pressure laps against the mountainous dam posed by the eastern slopes of the Appalachians, it sloshes south toward the Carolinas and Georgia.

78.   As more and more hydrogen is drawn into such a cloud, it is compressed by gravitational force to high density, high pressure and high temperature.

79.   As the ridge of high pressure expands northward, it will check the advance of a weak cool front.

80.   As winter nears, large high pressure zones build over central Asia.