Last year was very frustrating in that regard. It started in November, which was a ++++++AO nightmare which torched our source regions. That broke down but was instantly replaced with weeks-long Pac puke in December. By January even with great blocking there was no cold to be had in the entire hemisphere. By mid February that finally changed, but by then our blocking went "poof" and the cold dumped into the southern plains leading to historic events there. C'est la vie.