Pretty typical response to Maritime Continent & West Pacific convective heating here later in week 2 into 3 being shown on the EPS & GEFS forecast.
Pretty close to what I thought we were going to see after this week’s -EAMT: a compromise between the classic -PNA & the +TNH/+PNA pattern we are seeing in early December.
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I don’t think this pattern will have much staying power though & likely is just a brief reload before things get even colder down the road.
High background +AAM (for a La Niña) & continued slow eastward MJO propagation into the west pacific will favor a triumphant return of the +TNH/+PNA/-EPO type pattern as we get into early January.
I think this pattern we’re seeing in early December will come back even stronger in early January, w/ a little more active southern jet potentially to boot.
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