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Next plot is a preliminary plot, from the US, for the greater NYC area, showing post event snow depths in inches. For reference Long Island, east of the city, is the island in the lower right.
The next series of plots show the evolution of the snow depth in our analysis together with received observations.
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The development of the cyclone seems to be connected to a wave train triggered by a baroclinic wave six days before in the western North Pacific as we can seen from the Hovemoeller diagram for Z500 anomalies.
The plot below shows the projection of the flow on Kelvin wave mode on 19 January 00z at 150 hPa, with a strong westerly phase over Eastern Pacific, which might or might not be connected to the development of the cyclone. (from http://meteo.fmf.uni-lj.si/MODES/ )
3. Predictability
3.1 Data assimilation
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