81.   As the jet stream begins its inexorable southward migration for winter, it sometimes steers Canadian high pressure systems into the Rockies.

82.   As high pressure builds north of Washington this week, developing offshore winds will finally bring a bona fide period of summery weather to the Seattle area.

83.   As high pressure builds north of Washington this week, developing offshore winds will finally bring a bonafide period of summery weather to the Seattle area.

84.   As high pressure moves off the Atlantic coast tonight, mixed precipitation will over spread the area.

85.   As high pressure settles across the Great Lakes, clear skies will combine with weakening winds after sunset to promote comfortable sleeping conditions from Michigan to the Appalachians.

86.   As high pressure settles overhead Saturday night, subfreezing readings will extend into the Deep South.

87.   As high pressure takes control, drier winds will develop from the northern Ohio Valley to the Middle Atlantic States, prompting a return to sunshine.

88.   Aside for some lingering clouds in eastern Maine, high pressure will provide this region with ample sunshine.

89.   At least, it sounded so on this occasion, which no doubt was one of high pressure.

90.   At these depths, low temperature and high pressure allow methane to combine with water to form solid methane hydrates.