In a spectacular example of an extratropical transition phasing with a mid-latitude trough & existing low, the 00Z GFS bombs a North Atlantic cyclone down to 915 hPa on 27 October. **This is unlikely**, but a sign that another season of #BeautifulBarcolinicity is beginning! pic.twitter.com/F6m5ZecQsa

— Dr Simon Lee (@SimonLeeWx) October 19, 2020