11. A high pressure system brought clear skies to the Tennessee Valley and Mid-Atlantic states. 12. An expansive high pressure system will promote dry weather over the West on Monday. 13. At this time, a polar high pressure system moved off the coast of Japan. 14. The tranquil high pressure systems of fall favor pollution. 15. The 2008 Southern US Heatwave is being caused by a well entrenched High pressure system . 16. Shortly after, Nicole slowed tremendously, as it became stationed south of a high pressure system . 17. A Bermuda high pressure system will circulate tropical air into the southeastern states, including Florida. 18. The tranquil high pressure systems of autumn favor pollution. 19. High pressure systems produce currents of sinking air, which dry upon descent through the atmosphere.20. Meanwhile, a high pressure system will bring sunshine from Morocco through Algeria, Tunisia and Mauritania.
