A negative Arctic Oscillation (AO) has been elusive since 2013 but now the AO has flat-lined at deep negative values indicating high latitude-especially near Greenland-blocking. What has also flat-lined? Chances of any heat in Europe & Northeastern US into the foreseeable future pic.twitter.com/qYIa1MVxLA

— Judah Cohen (@judah47) May 6, 2019