Atmospheric circulation and Meteorological Outlook Feb 2015 (by Diego Fdez-Sevilla)
The conditions over the North Pacific for the 6th of Feb 2015 are dominated by a strong Low Pressure.
The interaction of the Jet Stream, pushing from West to East, extents the influence of this Low Pressure creating a corridor of low pressure moving across the North American continent.
The current conditions resemble those found previously to the formation of the Storm Juno beginning on the 23th Jan 2015. For more details see the post: The origin of the Storm “Juno” 27 Jan 2015 (by Diego Fdez-Sevilla)
Based on the actual conditions and the events which followed the Low pressure from the 23th Jan I would assume that the probabilities of seeing the development of a new storm over the East coast of North America are high. I would say that the level of uncertainty relies on the possible coincidence of finding currents of the Gulf of Mexico moving North, carrying moisture falling in form of precipitation and generating a thermal contrast enough to fuel strong winds. On the other hand, without a warm and wet current of air arriving from the Gulf of Mexico what is left is the high probability of finding cold masses of air being carried by a Low Pressure on the North side of the Jet Stream moving towards the East coast of the EEUU. You can see the NOAA’s weather prediction website following this link.
About Europe, a cold wave has come throughout Europe getting as far South as Spain where its impact left a profound print in form of cold temperatures, snow and rain.
Europe is suffering the configuration of a pattern in atmospheric circulation which brings moisture from the Gulf of Mexico all across the Atlantic being dragged far into the North by a High pressure situated over the UK. I am sure that such configuration will have some repercussion when considering its interpretation as part of the “naturally standardised” AO/NAO oscillations.