.FOR CALIFORNIANS it felt like recognition. In 2013 a procession of tornados, fuelled by atmospheric streams, gotten rid of a minimum of 21 folks and led to almost $5bn-worth of damage throughout the condition. On February fourth this year the exact same sort of storm again ravaged. Hurricane-strength winds buffeted the central coastline near Significant Sur. In Los Angeles famous people were soaked as they got to the Grammy awards' red carpet. Mansions in the Hollywood Hillsides were covered in mud. At least three folks have actually perished. What are atmospheric streams, and also are they a threat beyond California?