1.   As a pocket of cold air arrives aloft, the atmosphere will turn increasingly unstable, heightening the risk for thunderstorms.

2.   As the sun heats the ground and overlying moist air, the atmosphere will turn more unstable, setting the stage for strong thunderstorms to form by afternoon.

3.   At Tootsies Orchid Lounge, behind the original Grand Ole Opry, the smokehouse atmosphere had turned the photos of Opry stars into a gallery of yellow jaundice victims.

4.   Before many days I expect the atmosphere to turn sullen.

5.   But the atmosphere has turned darker.

6.   By August, however, the working atmosphere had turned hostile, Sgt. Maj. Hoster said.

7.   Most drivers seemed anguished, and the post-race atmosphere turned deeply funereal.

8.   Police waded into the crowd to arrest the dancers, and within seconds, the atmosphere turned tense.

9.   Shocked looks and cries of foul went up as a festive atmosphere suddenly turned bitter Monday at El Torito restaurant in Northridge.

10.   Such an atmosphere turns the whole idea of the student-teacher relationship upside-down.