I'd put higher probability on it. Or the time afterward, Jan 20-30 period.
It's not much of a risk that the N. Pacific ridge currently extending into Alaska and the Arctic circle on models will trend into -PNA, donsoutherland has done research that 45-day -PNA periods in the winter, like the one we just had flip to +PNA 80% of the time afterwards. Also, there is a kelvin wave starting to move warm water across the ENSO-subsurface, and I have found that correlates to more +pna conditions as it happens. Greater probability is that the N. pacific ridge ends up north with a low even undercutting it, vs the opposite, imo.