The latter part of the GFS has been toying with an extremely deep Atlantic cyclone in early January. Today's 12Z has a 917 hPa low on the 6th.

For comparison, the Jan 1993 "Braer storm" was 914 hPa and considered the lowest on record for N Atlantic (https://t.co/hmmQqbhGJY) pic.twitter.com/46UaWl0V6h

— Dr Simon Lee (@SimonLeeWx) December 23, 2019