The colder GFS operational forecast has merit as there is solid research that links strong -NAO events following MJO phase 6.

The data will likely slowly migrate to a colder forecast next week given the development of the Greenland block as seen on the GFS. #natgas #oott pic.twitter.com/LDp5XORgq8

— BAM Weather (BAMWX) (@bamwxcom) October 19, 2022