Yeah I mean this is about as big of a block of warm colors as we've seen since late Jan-Early Mar 2010... Possibly worth noting that the decline of the blocking thereafter only lasted about 2 weeks with the AO going just over neutral before zonal heights over the pole spiked right back up again. Granted, a late winter -AO doesn't guarantee frigid temps, but more than likely would help suppress any tendency for a big Nina-esque SE ridge I would think.