Gonna do a December wrap/January preview post soon...bottom line is the latter December/early Jan Pacific trough regime/strenthening PV verified, but the warm up has been abbreviated since the Strat has remained uncoupled from the troposphere....so we have maintained NAO blocking.
+PNA remains the theme of January...that has not changed since the fall, but it may end up having more neg NAO than the +TNH expectation given the Strat/troposphere uncoupling.