Worth noting the classic PRE (Predecessor Rain Event) signal over New England on today’s 12z ECMWF ahead of Tropical Storm #Isaias, with area of heavy rains displaced poleward of the TC itself. Discussed at length in Galarneau, Jr, Bosart (2010): https://t.co/oel9UMoChn pic.twitter.com/dKC6NxnbeP

— John Homenuk (@jhomenuk) July 30, 2020