A low-level trade wind surge triggered by a large, dry tropical wave that leaves Africa in a few days + low-level northerly flow associated w/ E US cold front later next week will prime the large-scale environment for tropical development in the Western Caribbean in early Oct https://t.co/qOwTbg75Xa pic.twitter.com/CWAec50tPn

— Eric Webb (@webberweather) September 23, 2020