11.   In such an unstable political atmosphere, no side could be sure it would come out ahead.

12.   On the other hand, an upper level through of low pressure located across Hispaniola is causing an unstable atmosphere over our area.

13.   This is creating an unstable atmosphere very conducive for heavy showers.

14.   This moisture combined with a very unstable atmosphere led to the development of thunderstorms across portions of Kansas and northeastern Oklahoma.