One thing that could flip the pattern dramatically is a major sudden stratospheric warming (SSW) event happening this week. The last few of this magnitude have led to cold air outbreaks. But SSWs are tricky because they don't ALWAYS disrupt the vortex. Some take weeks. Some fail. pic.twitter.com/Uj7WfvGcFN

— Mike Thomas (@MikeTFox5) February 14, 2023