Environmental, National Siberian Air Will Blow to U.S. as Polar Vortex Breaks Down & Jet Stream Crosses North Pole by eNews Park Forest on December 2, 2016 eNews Park Forest Author More in Environmental: People Outside Will Be Injured: Severe Thunderstorms Strike Park Forest March 31, 2026 Park Forest Officials Urge Residents to Protect Pipes as Coldest Air of the Season Continues December 14, 2025 Park Forest Workshops Join Global Effort to Prevent Bird Collisions August 21, 2025 Washington, DC–(ENEWSPF)–December 2, 2016