1.   Missing The region is covered by hypotheses centered over adjacent phonemes.

2.   An enormous high pressure system centered over Kansas will circulate the coldest air of the season into the East.

3.   An enormous high pressure system, centered over Montana, will control the weather in the western half of the nation.

4.   An expansive warm ridge of high pressure centered over the Gulf of Mexico, which has fostered recent heat, has also suppressed showers and thunderstorms.

5.   An upper-level low pressure system centered over western Wyoming will augment the lifting of moist air.

6.   A dome of cool, dry air will be centered over the Middle West promoting sunshine and a milder afternoon in the Great Lakes and upper Mississippi Valley.

7.   A large area of high pressure, centered over the Northwest Territories, has dominated conditions from the Maritimes to the Rockies with dry and relatively mild weather.

8.   A mound of unseasonably cool air will be centered over the Midwest Sunday.

9.   A large amount of relatively mild, damp air will be drawn inland and be lifted over a gelid air mass centered over upstate New York.

10.   A mound of frigid, dry air centered over Indiana will quickly glide east allowing milder, moist air to return to the Ohio Valley later in the day.