I was looking at the three to four week forecast yesterday, and I saw (in the discussion) that it was calling for a third SSW in early March, though it indicated that the previous two had been fairly weak.  So, I had some questions:

* As far as anyone knows, has this ever happened before?

* How strong were the previous two SSW events this winter?

* Assuming it happens, what would its causes be?

Thank you for reading this, and I look forward to hearing from you.