Hi Tim,

Yes, I believe so.  One of the key players for the recent pattern near the Pacific Northwest likely has been the negative phase of the Pacific/North American pattern (PNA).  (NOAA CPC monitors the PNA index here.)  This pattern in the negative phase is characterized by a big ridge of anomalous high pressure over the North Pacific and a trough of anomalous low pressure over western North America (among other features).  Both ENSO and the MJO impact the PNA (although El Nino typically forces the opposite phase of the PNA than what we have observed over the past few weeks), and there is a component of the PNA that is independent of both the MJO and ENSO.  There may be other important patterns to consider, but I would need to do a more careful diagnosis to speculate further.