What caused this change? A glance at 500hPa flow provides a clue. Progressive trough weaker, allowing ridge to nose back west & block #Irma. pic.twitter.com/7UoGvHHiJa— Philippe Papin (@pppapin) September 3, 2017
What caused this change? A glance at 500hPa flow provides a clue. Progressive trough weaker, allowing ridge to nose back west & block #Irma. pic.twitter.com/7UoGvHHiJa