Atlantic Multi-decadal oscillation (AMO) index from @ColoradoStateU remained strongly negative in April - 5th lowest on record for April (since 1950), trailing only 1990, 1994, 2015 and 2016. Low AMO value primarily due to very cold SSTs in far North Atlantic. #hurricane pic.twitter.com/gNeyTC6byw

— Philip Klotzbach (@philklotzbach) May 6, 2019