The upcoming extratropical transition of #Fiona is likely to be an instant warm-seclusion, where it becomes extratropical before losing its low-level warm-core structure. A climatology of these events is in-press with @MonWeaRev: https://t.co/ty5Wal2m4k pic.twitter.com/7ITLhginVt

— Clark Evans (@ClarkEvansWx) September 21, 2022