1) Let's reason out why the #GFS tracks #Florence NE of the #ECWMF even now 3 days till verification? Look at the upper-level cirrus canopy b/c cloud-radiative feedback is important.

The #GFS has a thicker & more expansive cirrus plume NW of #Florence. What is its significance? pic.twitter.com/MPu8h0iJAi

— Philippe Papin (@pppapin) September 11, 2018